Why are these Mania matches happening?

So first, I’m not a fan of WWE Raw brand and I’m an ‘Outsider’ watching Smackdown Live. Raw is just terrible T.V., plain and simple. I have watched enough wrestling in my life to make this determination. Now Smackdown Live; is not in the same category. It has wrestlers I’m at least interested in and the story-lines are tolerable. Except when James Ellsworth is on the screen. If I happen to be watching(which is rare now) I immediately change the channel. What census