I meant the actual singlet, not the sport, and was talking in terms of commercial viability for wrestling. Basketball gets a ton of money because bball shoes, shorts, jerseys, warmups, and other gear are worn by athletes, fans, and even non-fans. It's just normal fashion for many.
On the other hand, no one goes out or lounges around at home in a wrestling singlet and headgear (well, I can think of a few here who might, lol). Embrace the shorts and shirt combo, normalize it into something people will want to exercise or train or even lazily lounge (social media influencers, I'm looking at you) around in. Might as well give it a go and see if it brings more money to the sport.