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.