You might be right about some of these things, but you made this guy sounds sympathetic to me.

This industry has been disparaging quality and efficiency in favor of servile laziness and cheap ignorance for so long, and it feels refreshing to hear that some people are still fighting against that trend, risking going too far like this article certainly does.

Yes, of course, if you are using json in a data pipeline then you may not be a moron but in that moment you are doing something idiotic. Yes of course sometime the right decision is to create a language specific for a given task, and if you have never considered it you should question why.