See that's funny, I consider it *healthy* when cats lick up the gravy. They need moisture in their diet and they want that moisture. The gravy provides the moisture plus food. It's like us wanting soup - it fulfills both hunger and thirst at once. With the pouch food they will eat the "bits" too sometimes but sometimes they'll just lick up the gravy. We consider that fine in both cases.
It's much better for them than just drinking raw water - and considering how their tongues are shaped, the thicker liquid is much easier for them to ingest
When a cat eats dry food, the food actually acts as a sponge in their stomach, sucking the liquid out of them. So it dehydrates them, then eventually when it digests they get the liquid back again, but in the wild they don't really eat anything that's bone dry. So I definitely agree that even dry food should have a moisture sprayed on it