> What is the distinction between a chef trained at a vocational school and a lawyer trained at a law school?

One is considered by society to be a 'tradesperson', while the other is considered a 'professional'. Society considers law to not be a 'trade' because it is a 'profession' instead and society sees these as mutually exclusive by definition.

I think what you really mean is you don't agree with society's definitions. That's fine - it's an interesting discussion and I didn't express any opinion on it myself. But I don't think you were ever really mistaken about what the original comment meant - you were feigning confusion as a rhetorical device, which is why I think other people down-voted you.