Jpg users, why?

I'm genuinely curious why some 7d users (in particular) shoot jpg. I don't understand paying so much for a camera and limiting oneself so much. It not a judgment or criticism, I'm trying to understand the benefits. To me if I wanted jpg I get a mft oly camera.

Is it hard drive space?
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God doesn't exist, glory to man. (pretty sure the mods will end up removing this despite similar contrary opinions in plenty of sigs, we'll see)