Not sure about Dreamweaver, but the fact that no Frontpage equivalent exists this day and age, and armies of developers are grappling with HTML, React and GraphQL (e.g. Gatsby) to generate what are essentially websites, is very surprising.
(in Jest, I know it doesn't solve every problem!)
Now for things that aren’t my core business (day job or side project) I’m much more likely to reach for a paid off-the-shelf solution.
After months of putting off building a marketing website for my side project I just paid for a tool to build/host it so all I had to do was plug in my info. Yes I could have hosted it for pennies on S3 with CloudFront in front of it but instead I setup a cname, paid like $20 for the year, and let this other company handle the responsive design (template) for me.
For web apps the level of custom logic makes it unavoible to just code. Since web developers tend to be coders they would code static sites too. And use what they are most comfortable with, usually React.
They're made with Wordpress, Squarespace, etc.
Webflow has been around for a while and I’m sure they implemented AI already (I didn’t even check). Other React-based tools surely also exist, but have an even smaller user base.