Are modals/dialogs perfect? Absolutely not but completely eschewing them is also a mistake. In all things, moderation.
It's of course horrible.
That's just, like, your opinion, man. I disagree. Don't imagine yourself as the universal subject.
> inaccessible
I have no trouble whatsoever navigating and understanding the page with VoiceOver, and it obviously passes contrast and color rules for readability.
> and borderline unusable
Completely disagree. It's literally arranged text on a page. There's nothing to "use".