Instruction manuals often only contain legally required information, making them particularly useless.

You've happened upon the difference between compliant and capable. See also, any military technology, which costs 10 times the normal price to meet strict compliance requirements, often while completely disregarding capability.

My favorite response to the issue is the AcessiByeBye plug-in (https://www.accessibyebye.org/) which blocks accessibility compliance overlays that make web pages difficult to use with keyboard navigation and accessibility tools like screen readers, but are needed to meet accessibility regulations.