PreCures are wholesome characters (almost) all of the time and that is a good thing.
From time to time, I find myself thinking about more "edgier" Cures and it is a topic that also comes up here in the sub every now and then. And this is an intriguing topic to think about, I won't deny that in any way.
However, as I watched a "similar show" today which has a rather "questionable" protagonist where I am asking myself how on earth I am supposed to see her as a serious magical girl, I am absolutely happy that PreCure stays away from this and remains a comfort show where we just follow around genuinely good people. I almost never have moments where I disapprove of the behavior of a Cure (maybe once or twice in three seasons?).
Regardless of other aspects, you can always count on the fact that when you watch PreCure, you'll get to see nice and wholesome characters who light up their world (and my mood as a viewer). Spare me the drama, let me see some girls who make their world better, and I'm happy for it to stay this way.