Sure they are fun to work through, but the games of someone like Capablanca or Fischer aren't going to provide the amateur or class player with much instruction.
They will give you plenty of innovation and imagination to admire, but those things can't be taught. So...other than for the simple pleasure of playing through them, why "study" GM games?
I love how you put the word "study" in quotes.
Why would an amateur study the pros? I know right? Makes no sense. I like your hard hitting, no-BS style maskedbishop.

Studying doesnt help you improve? Of course, just studying will not do much.
I couldn't have said it much better.
You could have removed all 'not's too, to make the entire comment favourable to you.