This isn’t an accurate take.

Fashion trends are created in the same way art, architecture, and music trends are. By people who are talented and come to be influential.

The fashion “industry” is the very last stop in the process. The trends are determined by the “cool kids” for the most part.

If you don’t have exposure to the communities that actually drive trends it might feel the way you describe but if you live in a place like New York or pay attention to certain media the dynamic is obvious. If you’re basing your read on what you see in the local shop you’re fully a year or more behind the curve.

Which is fine. You don’t have to care about it at all really. But the your description of the dynamic isn’t correct.