It also allows it to be much worse too. I can't wait to do tech support for my grandparents that followed the instructions to install ScamAppStore to install an app they saw on a Facebook ad.
I do tech support for my parents that both use Android. Haven't had a sideloading incident once in the decade+ they've used it (although I did show my dad NewPipe, which he uses constantly now).
On the contrary, it allows app and payment security to be better than what Apple offers.