I mean, if it comes to a lawsuit, sure, but the system is designed so that permitting and inspectors catch most of it. If you're trying to build your bathroom under the radar without a permit that's an entirely different analogy.

But either way, it is the responsibility of the regulatory body to enforce. As other people have noted, this is not a Waymo problem, they're just following the status quo.

huh? I work in construction (electrical drafter) and I've been called out for my installs not being ADA (after the designer gave me a non-ADA compliant design).