Presumably you're aware that comparing one thing to another does not imply that the GP thinks they are anywhere near equivalent. The common meaning of the word

Presumably you're aware that comparing one thing to another does not imply that the GP thinks they are anywhere near equivalent. The common meaning of the word "comparable" is not "can be compared", but "roughly equivalent". You are acting as though GP considers them comparable-in-the-second-sense; GP's post actually claims them to be comparable-in-the-first-sense.