Why does this poster have to post specifics when making a general statement?

Can you imagine responding to "everyone dies" with "please post specifics, thanks"?

From what I can see, this poster stated that no programming language is perfect, and I'm struggling to see why they need to back that up.

The original post wasn't just a general statement, it was inflammatory and accusatory. The poster stated that Elixir not only teaches programmers the wrong things, but that it leaves them damaged. Did not give a single example or explanation for their rationale.

It was far from a universally agreed upon statement like "no programming languages is perfect".

It had criticisms without any explanations.

If someone makes a statement I'm skeptical of, I want to push for examples.