This sounds like, “As a carpenter, I shouldn’t have to care about types of wood, or saws, or cuts, or ergonomics, all to make a chair.”
What if you weren't making a chair, but a hammock. They can both do the same thing, but are very different approaches and requirements.
Same with websites. They are a medium for conveying information. You don't need (traditional) websites or apps to do that. I can even ask for information and receive information completely independently of a website.
The only reason devs need to care about all these things is because of the medium being used.
I've sat on plenty of couches where the person who made it didn't care - so there is probably a world where this makes sense