Yeah, it's exactly this. My spouse has a chronic condition which precludes them helping me, and I'm also not great at detail work (especially if it involves heavy labor like lifting things). I would inevitably end up having it be just slightly not level, and it would bug me for the rest of my days. :-) I also have other things to do and would rather pay someone to do it for me. When I was younger I might have tried to do it myself, but no more.