Well, because wrestling is not fighting, it was never meant to be about punishment and damage, but to control the other. Somewhere in its path they decided that submission would cut, but that's really not the idea behind wrestling in the first place.
Just look at Covington vs. Maia, Covington had a superior standup to Maia, he could have finished Maia ni the first round had him decided to fight. But you know who we're talking about, right?
Covington kept the whole time only looking to score points and avoid fighting, he only chose to fight when he was 20-18 and less than a couple of minutes until his decision.
I'd love to say that was the only boring fight Convington made, but it's not, in fact it's the exact opposite.
I don't want to sound triggered or anything, but you guys need to stop denying the obvious and accept that wrestling is not fighting, just a way to exploit the rules and win by clock. If wasn't for wrestling UFC would have never made into US and possibly Canada.