This has always been my take too, it reeks of a DSL. It's sort of like a no-code/low-code solution for people overwhelmed by the complexity of the FE ecosystem and/or those who don't want to learn anymore web technology but are proficient backend engineers. This is a completely understandable feeling and I have this feeling almost every day. I think DSLs that abstract markup work great for personal projects (just as a CMS works great for personal websites and marketing blogs), but for anything that starts picking up utility you will inevitably have to do something that breaks out of the DSL's abstraction.

Here's my fear of using DSLs like htmx. At first the escape hatch is your friend but eventually the project stops being an htmx project and becomes a "hyperscript" (or equivalent) project. For anything that reaches maturity, you're then left with the painful task of figuring out how to port hyperscript and htmx to react/vue/svelte (the very thing you were trying to avoid in the first place). This is way harder and more painful than using one of these frameworks as a foundation for your project.

What I don't get is why people that harbor this resentment to FE tech, don't just limit their feature usage. Think server components are dumb -- don't use them! Think react hooks are stupid -- write class components! In the event you actually have to do something that requires you to do something outside of your comfort-zone, you just have to push a little bit of your react/vue/svelte knowledge instead of appending more escape hatches to an increasingly bastardized DSL abstraction.