The last post got me thinking, I feel like a lot of linux distros are good for 'everyone' these days. There is much less friction and involvement needed for the general user than there used to be. Any distro with an easily accessible package manager and automatic driver installation is good to go for most of the general public. And the more technically inclined are much more willing to put up with extra friction/involvement that comes with more in-depth tinkering of the system.
The issues mostly come through unwillingness of needing to learn new things. People are used to for instance microsofts office suite, or NVIDIA's settings manager in windows and do not want to make the effort to need to learn to use another software to do the same thing. (Until an upstream update changes the UI and people are forced to relearn stuff. They might grumble but rarely switch, which would actually be the perfect time). I don't think (anymore) that the problem for linux is that is is unapproachable, but more that people need to be willing to approach.
I say this as someone who has used mint as daily driver for a long while, since it was the closest to what I was used to (and much of my office suite is still microsofts due to requirements at work). I was however willing to wrangle with it in order to learn more about it (and nuke my install at least once, although I am sure I could have saved it, a reinstall was more time efficient). I also distrohopped a lot at the same time, finally landed on endeavouros, but even with Arch I do not feel much friction. If anything, having the arch wiki makes things more approachable than it was using Mint.
The point I am (maybe, if this is not just rambling) trying to get to is that people are generally unwilling to learn new things if they do not need to, so the best "safe for everyone" distro might actually be the one with the best documentation/tutorials that make onboarding easier.