Your right fashion doesn't exist in a vacuum... which is why it's possible to get input without directly correspondence with the target demo.
To suggest that you can bring a product to market without any input whatsoever suggests that a designer could operate in a vacuum.
But that's all besides the point really. This company doesn't design fashion. They slap esports logos on athletic wear. In this case, they are marketing the fact that they now slap esports logos on generic women's tennis outfits - and claim it's a gesture to benefit women in esports who receive "backlash" and apparently need a "new identity". The only way to come to such a conclusion that this garment will serve this purpose, is to live in a vaccum.
