You're throwing around all these buzzwords making it seem more complicated than it already is. A container is literally just an isolated process. That's it. No need to explain how the kernel treats it. They wony won't even ask for it unless they're ready to ditch the Atomic life.
And remember this is for absolute newbies. One sure way to make someone hate linux isn't to tell them they can't fuck up their system. It's to let them fuck it up and then call them an idiot when it happens. (I'm sure you wouldn't do that)
Not everyone has the time and energy to make their OS their hobby, and if you're not gonna be their sysadmin, i how can you trust they won't fuck up their system?
You might say they deserve to have their system ruined, but that is no way to make a Linux convert.