(One of) the reasons why I like the walled garden is how it simplifies everything troubleshooting-wise. I have a few quirks to know, the rest is because of hardware failure and that’s it.
My peer not being tech-savvy might install stupid things from stupid places and it might be a problem.
The way it’s done it’s unlikely, but still it just complexify things for next to no reasons in my book. (Yes 30% is a lot; I personally don’t care, though I do recognize I’m a good position and I can afford not to–but then again, the most vocal about the 30% are not the most unwealthy…)