#4 He's only a babyface because Roman Reigns went to Smackdown Live
Seth Rollins was not the top babyface on Raw at this time last year. Not even close.
That role went to Roman Reigns, the Shield member who has been superman punching and spearing his way into the hearts of millions ever since the Shield broke up--the first time.
Charlotte Flair to return and wrestle a CURRENT CHAMPION?
Reigns has his detractors, but he has the right attributes for a babyface. He's courageous, fights for what's right, and is the idol of little children around the world.
Reigns also never cheats something that Seth Rollins is more than willing to do, even when he's working as a babyface. His assault on Brock Lesnar at WrestleMania 35 may have been effective--it earned him the name of Beast Slayer--but it was not the action of a good guy.
When Reigns jumped to SmackDown Live, it left a void on Raw for type babyface. This void was filled by Seth Rollins, a man who works much better as a heel.