Or you could read man pages, ask people for help, read books... all of which are more closely aligned with self-hosting than outsourcing the whole process.
I agree you could use LLMs to learn how it works, but given that they explain and do the actions, I suspect the vast majority aren't learning anything. I've helped students who are learning to code, and very often they just copy/paste back and forth and ignore the actual content.
Sure, you could. But this isn't my job, it isn't my career. I just want Nextcloud running on a machine at home. I know linux and docker well enough to validate the ideas coming out of Gemini, and it helps me find stuff much faster than if I had to read man pages or read books.
And I find the stuff that the average self hoster needs is so surface level that LLMs flawlessly provide solutions.