There are imperfections in any piece of furniture and yet we are still building furniture? How religious!
You sound like this to me.
There's a whole world between "accessible HTML is never achieved anywhere" and "accessible HTML is fully achieved everywhere". As other commenters already told you, we are actually mostly there, there's no complete failure here. Sure, shit's not perfect (far from it, sadly...) but I feel like you are throwing the baby with the bath water.
I'm not willing to increase my electricity bill or spend tokens to make up for your unwillingness to use widely accepted - and mandated by law in many cases! - solutions. I'll just pass and probably others will do as well.
I'll stop here, this is not productive, none of us will likely move from where we stand. Let's just say that you are apparently alone in your position here in this discussion and you have so far failed to convince us. Call that position in which everyone here is except you "religion" all you want. I'll even snarkily risk a tu quoque by emphasizing that AI is no magic dust.
Good day.