Understanding of technology necessary to self-host a blog (whether it’s a hobby or you’re writing full-time) is not that different from, say, knowing enough about how various components of a motorcycle work to maintain and repair your own ride (whether it’s a hobby or you do pizza delivery full-time). To deem it of no possible interest to and too difficult to understand for anyone not in the chosen minority of experienced software engineers is at best misguided, at worst elitist (when it comes from one).

Sure, some can’t be bothered. Yes, some would rather pay a professional who often (notably, not always) would do a better job. True, some things you fully grasp only after years of experience. Still, it’s not that difficult. You don’t need to know how to write an OS or build an ICE from scratch to do an adequate job. People routinely learn to do quite complicated things out of passion and/or necessity even when it’s far disconnected from their primary profession; spend some time with the right sources of information and you’ll be alright.