It is difficult for me to see what the real issue is with examples given. It seems to be more an aesthetic preference of the author rather than a technical argument. People can use formats for whatever they want. :P
If you told me that the transmission and parsing rate is too slow for their application, that's a real dig at it.
I think it's a bit like trying to explain why a Python REPL isn't a substitute for a calculator? Like it can of course do what you want, and you can't "see" what's wrong if you just take what you see literally (you'll obviously get the same answers regardless of what tool you use), but it's just... not meant for that.
If you told me that the transmission and parsing rate is too slow for their application, that's a real dig at it.