It would arguably makes things easier but it would not lead to a better game. Less arguments about rule sets or rule changes and so on but D&D is still the best...at least for the time being.
I mean, obviously it's highly subjective, but D&D is not the best and never has been. It's just the most famous, it's the Justin Bieber of rpgs, and this comes from someone who really really likes 5e.
EDIT: I do partially agree thought with the idea of D&D crumbling in the next years. I don't really trust Jeremy Crawford, and I'm worried that under his direction the game with go back to being a dungeon crawler designed for lawyers more than humans.
This I cannot in good conscience agree with. 5e has been the gold standard for tabletop RPGs. It's not perfect, but nothing else gets even close, forget about better.
Its as much the gold standard for RPGs as McDonalds is the gold standard for restaurants.
It benefited from its dumbing down strategy coupled with unexpected windfalls like Stranger Things, the success of Critical Role (which now abandoned D&D) and Covid. But dumbing down has its limits and their much hyped movie was a flop.
Its strategy of diluting everything, races, skills, story, will eventually backfire because while that allows people to quickly pick and also does not create many hooks to stay with the brand as everything is just so meaningless.