I don't really buy the defeatist, niche sport argument. MMA, beach volleyball, and sport climbing were niche sports until they weren't.
A big challenge imo is that wrestling doesn't really have any big charismatic personalities that have broken through outside of the sport. JB and Chamizo are popular, but they're not household names like you see (since women's sports were mentioned) in women's swimming, gymnastics, tennis, basketball, and soccer.
Even non-sports fans are able to connect with names like Katie Ledecky, Simone Biles, Naomi Osaka, Diana Taurasi, and Alex Morgan. That gives them a reason to tune-in and watch. Wrestlers otoh tend to be more subdued and humble, stick to generic talking points, and don't amplify rivalries as they should. So there's little reason for the media to pick up on wrestling.
I mean, there are a lot of reasons why wrestling doesn't get more mainstream attention. The lack of personalities to love or hate just doesn't do the sport any favors.