It isn't.

All of us were laymen at one point.

I still am, for one.

What I see big apps do is treat users (both power, regular and new ones) as idiots, ruining the experience for everyone. Users should be treated reasonavly as reasonable people. This means giving them the options and opportunity to become power users, as opposed to saying "yeah, that'll never fly with them" and then you're the one to shoot all of them down preemptively.

Violentmonkey is simple enough to install as an add-on, and clicking "Get a Script" requires no coding background.

So yeah. Impossible for utter idiots.

Which users are not.

They're reasonable people like you and me, and giving them the opportunity to know about Violentmonkey and what it does should be more enough for them to use.