I suspect there's not just one cause of slowness here. Pure language benchmarks also tend to rank Ruby very low. So I'd wager that a fast Ruby framework would still lose to a fast Go framework.
But, saying that the frameworks using the language under the hood has almost no relevancy is wrong in my opinion! And that is what I was trying to point out.
I did not claim that in general sense, I said it with the context that even if Ruby got accelerated a lot then that's still kind of inconsequential because most Ruby usage is Rails.
So I think you’re right.
More accurate statement would be: Python is piggy-backing on hugely successful C libraries and claims big performance on their backs, IMO.
e.g. Numo for NumPy or Ruby-Polars for python polars.