For a subset, sure, the main barrier to entry is people believing themselves capable of following instructions and caring enough to invest the time. AI enables some people to believe in themselves, but most still won't care enough if there exists another option where they can just login to a web front end and "add post" (granted, GitHub lets you do this too, edit a repo from the front end and add a file, I suspect a GitHub action can be triggered to rebuild a static site from there, then you have free, unhackableish, high performance hosting, but theres still a few concepts to learn, especially wrt DNS, and you don't get any analytics or the e-commerce obviously. Squarespace and Shopify will continue being profitable despite certain things becoming a little easier.
AI output is in a frustrating half way place where the results are simultaneously better than an amateur and worse than someone with a few years of professional experience.
Makes it very tempting to use, but unless you're good at attention to detail and reviewing the output, it's also by default[0] producing certain tells that make many people very weary — think of the meme "if you didn't bother to write it, why should I bother to read it".
[0] you can get past this fairly easily, but IMO learning that is a skill that only comes to the kind of technical person who would also not have any trouble learning the markup/markdown anyway
