A server will never love you back.

Neither will the majority of hobbies for self-enrichment.

It isn’t unreasonable to want some alone time.

Well I'm ugly so… at least it doesn't actively hate me either.

Yeah, also neither it wants to move out because you pushed start button too many times or stay sullen over weekend because dinner plan on Friday got canceled.

Neither will a lizard. People still have them.

It's purpose in life is to serve not to love.

Unless you run your AI waifu on it.

Stop with this infantilising crap. People can have both rewarding relationships and pastimes. Just because someone likes configuring software does not suggest they neglect their relationships or have delusions that need correction about the value of things in their life.

Sure, run a homelab as a hobby. Everybody has hobbies.

Once your user count goes beyond 1, you suddenly have a SLA as people are dependent on your services. Like it or not, you are now the primary support staff of your local cloud business.

The more users you get, the more time you will need to spend to fix problems.

At which point does it go from a hobby to a 2nd job ?

You're still arguing from the point of view of someone who doesn't want to do it or isn't interested in doing it. Your GP said you 'get' homelabs but it's increasingly clear you do not - and that's ok. People run homelabs because they enjoy learning and tinkering. If they don't enjoy it, or they can't risk having the odd problem, they have other options they can explore. It's not really any more complicated than that. Believe it or not, people are capable of evaluating the tradeoffs and making a sensible decision about what to host themselves.