Not saying it definitely would have happened, but the racism, sexism, stupid humiliation rituals and other elements that made pro wrestling so repellent to many people could have been weeded out decades earlier if not for Vince.
One of the biggest pieces of WWE revisionist history is that wrestling NEEDED Vince McMahon and his monopoly. Bottom line, wrestling was a thriving business before he even thought about coming into the picture. If absolutely ANYTHING, he made it worse.