The answer is community, the real, local, messy, annoying kind.

It’s theoretically possible for someone to be a one-man-band and know everything needed for modern life - but it’s exceedingly hard and rare, and even then they’ll fall short relatively quickly in specialized once-in-a-lifetime issues.

You don’t need to know how to replace a toilet (though you should) or other more complex plumbing tasks - but you can know a guy.

And the plumber doesn’t need to know how to run a homelab, just know a guy who can answer the questions.

Nobody in my family knows how to do the jellyfin stuff I do, but they all know how to consume it. And some will be interested and learn more.