#4 100% homegrown
There was a time when WWE produced the top talent of the company at a developmental level. John Cena, Brock Lesnar, Randy Orton, Shelton Benjamin, The Rock, Kurt Angle and Dolph Ziggler, among others, came into the company without any prior indie experience.
Compare that to the current WWE landscape. Kevin Owens, AJ Styles, Sami Zayn, Neville, Dean Ambrose, heck even Becky Lynch hail from the independent wrestling circuit. Roman Reigns stands out from the clutter, as a top guy who was created by the WWE developmental system and hence is Vince McMahon’s source of joy indeed.
Sometimes believing in 'your guy' is a matter of ego and pride. Vince wants a guy that he discovered and honed for the top role to lead the company, and not have performers from the indies in that spot.