Culture fit is a term I don't particularly like. I think it is often used as a handwavey justification for a no-hire on the basis of "we just don't like-like you"

Still, culture is very important in a workplace. Culture is also something that has to actively cultivated, to guide it in good directions.

I think Joe Mastey has some good thoughts on building a positive culture of learning, whether or not your management supports it.

https://youtu.be/V69Sinlp6Ew