Yes, this was my dilemma, too. There IS value in talking, but when does it become focusing on it too much and enlarging it to the point where it consumes you? And when is a person talking too little, burying something inside to fester and be secret?
I don't have an answer for these questions, because I think we each have to decide for ourselves when we are in need of talking about it, and when we are ready to begin life again. And it flows back and forth a bit.
When i was starting to recover from what i went through... i found a forum of other survivors. They were all wonderful and so supportive and it was quite comforting to be able to talk and talk and talk and have others who actually understood what you'd been through! And sort of like being a young child in your mother's arms you'd get a sort of emotional protection and lots of sympathy, along with encouragement that you didn't have to push yourself out of the warm and protective haven. Certainly it felt great to feel validated and feel like you didn't have to do anything scary.
But as months went by, i started to wonder... why don't i see anyone actually get better here?
People would occassionally disappear from that forum, but they didn't get better
first. And i kept wondering why is that???? why????? ...because i wanted to know what was the next step for ME... to get BETTER... not just be comforted and validated every time i complained, but to ACTUALLY HEAL. I didn't want to just circle around and around like i saw everyone else do! So I got very curious about what happened to the people who disappeared... did they heal? What were they doing instead of talking about stuff? And then one day it hit me!.....
You can't get well and become happy doing the things that the suffering, unhappy, people do. You can only become happy by doing the kinds of things happy people do.And happy, healed people simply don't spend most of their time dwelling on the ugly past or talking about it at every opportunity and thinking about it constantly and using it every time they can offer it as an excuse as to why they aren't doing something like applying for new work or having fun or doing something they now find scary or trusting people. Happy people don't even spend most of their time in "healing" pursuits like survivor forums and therapy and support groups. Instead, they are at their kid's ball game, or going for walks in nature, or taking a knitting class or planting tomatoes or taking up yoga or applying for a new job or going to night school for a degree or talking about something relatively unimportant with their friends or making a new friend whom they DON'T even tell their tragedy to, or whatever else makes up happy lives!
And that's why i didn't see people get better at that forum, not because there was any problem with that community, and not because people talking isn't helpful. It's just that at some point each person in their healing path... if they REALLY ARE GOING TO HEAL... they quit cycling through the past and abandon talking about their tragedy again. It's not that you're exactly done talking about it when you quit, because you can always find more... any one of us could fill our whole lives and then some trying to resolve our past hurts! But it really is... that one day... every healing person just
abandons the pain for something else. Something more worth their attention. Maybe they got distracted by something more fun.
The irony is, the phrase survivors detest... "get over it"... is actually valuable and kind advice, we just aren't always ready to hear it and don't understand it at the time. What is meant is: begin replacing your thoughts about the abuse you experienced with thoughts about more pleasant things and enjoyable or productive activity. I had a friend put it this way, "don't dwell on it." I've thought about that so many times! I still say it to myself when i find myself getting stuck in the mucky-muck of sadness.

Anyway, that's just my thoughts on it... you may not agree, you certainly don't have to. I think each person has to find their own path, and no one is going to know but you when it's right to shout from the hilltops, when you need to find understanding or advice, when you need to be angry, and when you are ready and need to start focusing on other, more pleasant things and today and the future.
What i would suggest is... talk about it whenever you feel like it for as long as it feels right for you, but just keep in the back of your mind that you actually want to have your life back one day where your time is
not filled with thoughts of what you have endured or how you feel changed by it, and is instead filled with joy, confidence, loving relationships, thoughts of whatever is important to you... your family, a job you enjoy, hobbies, and all the good things of life!