Having some kind of hidden “I know what I’m doing” mode would make sense, but would probably defeated the same way as “I’ll teach you how to open browser console” to paste some command exploits.
What I find interesting is that there's been little interesting making something like QubesOS for as many consumer devices (portables as well as desktop) as possible with an interface as painless as possible so people actually use it, and then the blast radius from any problem is smaller. There's also the hosted services side of computing where isolation on the same host is an expected feature and vulnerabilities like meltdown/spectre are such a big deal over the past 8 years, but it only gets seen as a curiosity on consumer devices.
I know it's on a much, much smaller scale, but I'd say the move to sandboxing apps / browser tabs / profiles is aiming for precisely that and in a way that's invisible to most users, which is probably for the better.