That's a valid criticism of htmx and there is a developer who created a conceptual fork of the idea eliminating this design decision:

https://github.com/kasta-ua/twinspark-js

I view the issue pragmatically: I think developers should consider LoB strongly when building systems and when using htmx, but I also recognize there are other design considerations (principally DRY). I can definitely see both sides of the argument, however, and would encourage people not to abuse attribute inheritance, just like I would encourage people not to abuse generics in OO languages.