Sideloading must always remain available, but I feel like restricting the ability to unlock sideloading might be potentially beneficial. There have been reports of people getting their bank accounts emptied after sideloading some random app and giving it accessibility permissions. Preventing people from granting such permissions on impulse with a more tedious unlocking process could potentially benefit some.
Of course people will disagree. Why should we be inconvenienced for some idiots? It comes down to how willing you are to be inconvenienced for the safety of these people I guess. I already know I'll probably be downvoted given the tech inclined crowd on lemmy these days, but I personally wouldn't mind performing an adb command or smth. Something like executing an adb command once is a relatively small price to pay imo.