I think a lot of people using JS don't know any other languages. That is ok. But many have convinced themselves (and each other as a community) that this is RockStarTech(tm) and as good as it gets, as the article suggests.

If anyone/anything comes along and claims otherwise they will probably lash out against that. It would mean invalidating all the emotional investment (and real code and time investment) they put into it in the past.