Learn what exactly?
How to be a performer, Being successful at this level is more than just work rate, there's Promos, psychology and story telling in a match.
The platform is bigger but the wrestling isn't. It's like McDonald's. Yes, you've sold the most hamburgers but your burgers taste like shit. That mom and pop shop down the street has better tasting hamburgers.
Usually we you quantify a sports or entertainment business it's based on revenue, profits, attendance and ratings/viewership.
I wouldn't classify WWE as deep Waters nor would I classified their talent as sharks or killer whales. You highly overrate WWE talent. If anything especially in Giulia's case she's already come from the deep waters. Nobody in WWE is gonna out work her unless it's another Joshi (Asuka, Iyo, KAIRI). This statement is exactly why they will need the performance center. Once again the WWE style is not about being a great worker but developing your character and performing that and getting the audience to love or hate your character. Just understanding the difference in having to perform in a silent library to 20,000 screaming fans cause alot of performance anxiety and stage fright. The biggest stars in history were not "great" workers with the exception of Ric Flair HBK and Brett. As wrestlers that had ring work Hogan sucked, Cena Sucked, Rock sucked, Undertaker sucked. Saying WWE is not deep waters is like saying players in the USFL don't believe the NFL is deep waters or players in the Euro League or CBL don't believe the best players aren't in the NBA. Euro League may have better pure shooters but you will see how they fare when they are in the big leagues only a select few can transition their skill set into an overall game in this case Wrestler that will have what it takes to be a top superstar.