Exactly. It don’t care if it takes more work for you as a developer to make everything a pageable URL. Just make it work the way I expect it to work.

... and developers don't care if users like new tabs, they write SPAs.

After spending a day trying out a new framework my junior dev asked me: "why don't we do it the old way? We would have finished the first feature already. We can do everything the framework does already with our old tools"

So I reverted my changes and worked on features instead of stack

Quite a good thing for a junior dev. Not being swept away by hype and being focussed on the thing one actually should accomplish. I don't know that person, but this smells like there is potential.

That junior developer’s name? Albert Einstein.

I'm not defending it! I hate it too!

I was just responding to it being a criticism of 'designers', maybe I misread that, but my initial reaction was as above, that it's not completely trivial to allow, or like it necessarily comes for free and has been 'turned off' by design.