For some reason accessibility is still considered an advanced skill. But then, for some reason, most developers still cannot manage HTML without monumental help even though the dynamic client-side web is 25 years old.

> For some reason accessibility is still considered an advanced skill.

Yes, unfortunately. I would agree if "accessibility" = "making a website fully WCAG-compliant". But finding and fixing the most common issues shouldn't be a big issue. Just run Chrome's Lighthouse Audit or use the hosted version at https://web.dev/ . Tools light Lighthouse will detect common issues, explain their importance and offer a way to fix them.