That's an apples to oranges argument here. So first a market argument:
AWS downtime results (or the lack thereof) are what's desired by the market. Blind people are a small market, and prioritizing them equally or disproportionately is an inefficient use of resources.
This can be countered by "we can't just abandon the disabled". And we haven't; In this case, the disabled guy can call in and order a pizza. The core service is still available to him.
However, I don't see why forcing all features for every disability should be mandated. It's a small proportion of the populace, and while steps should be taken to enable usability, I don't believe that their desires warrant as much resources as the mainline, nor do I think we should force design to cater to them.
This is particularly so as, from what I get from the ADA, there is no size requirement for such. If you classify websites as "public accommodations", then all websites big or small now have yet another thing that they can be sued for.