There is a subtle difference between objective constructive discourse and pseudo-religious language fanboyism. The latter happens far more commonly than the former. In fact many who do the latter even believe they're conducting the former when in fact they're misinterpreting their own personal preference as objective fact.

To example this point: the fact that people do still sometimes need write some code in assembly really should demonstrate that your point would be better framed as "different languages serve different use cases so it's pointless convincing everyone to conform to a single language" -- which is precisely the point the OP was also making.