Where you train and who you attribute your training to is not cut and dry. It never was, not even when we were living in an analog world. Taking from as many teachers as you can isn’t training, no matter how well-known they are. Hopping from studio to studio isn’t training well either.
Most importantly, every dancer needs their anchor, the teachers that shape them with a foundation that will serve them wherever they go.
The key is finding the perfect mix. First, there are the go-to’s, the mentors that really know you and know how to pull out your best, and aren’t afraid of offending you if they push harder. They may be a different set of teachers over the years, but you always need them. Second, there are those teachers that you love to take from once in a while, and it’s always a treat when you do. Lastly, push yourself to take classes from completely new people. This one gets harder the older you get. And don’t stop taking class, even if it means giving yourself a class and imagining what your mentor is saying to you with each movement.