I am not sure, I might come out strong, but I a feeling all these stereotypes (and fighting them) a bit more than for example author of this article, since I am developer in China, where the situation is... Well you cannot imagine until you try it.
So to sum it up. All developers - keep in mind to support as much as you can as painlessly as you can, but do not publish articles about this, cause you just helping people to stay lazy.
Failing to do data validation on the server side is application suicide.
Depending where you are in your development lifecycle, it is probably better to focus on the 99% of users who have JS enabled and are not using screen readers. Then, when you need to be fully accessible go back and fix it.