I think the problem is exasperated when developers can’t put emotion aside and recognise issues, it may be as simple as proper training or choosing the proper tools.
But just objectively looking at the point the author is making, he is right.
Case in point, Indiscriminate use of frameworks have made the web bloated. In fact, I bet half the Links posted in HN won’t even open in slightly older browsers.
But the content they post are interesting. It is not a question of skill, as other commenters here want to point out.
So it seems to argue that these people just don’t care about accessibility or coverage of the tools they use.
Empathy is key. One should be conscious towards their audience, since web is open and far reaching. It is not just a group of developers in their near vicinity or latest conference hosted in a tech city, they should care about.
If you are building something, one should carefully evaluate the tools they use and how it will end up getting consumed by a wide demography of end consumers, who don’t have the same machine as they do.