It's notable how tolerant we were of grain, blown highlights, absent shadow detail, lack of sharp focus, subject movement and other technical shortcomings back then. Nowadays people freak out because noise is evident at 12800 ISO, and auto tracking missed the singer's eyeball in favour of his nose.
The take away point is creative photography has always been a means to elicit emotion. Anything that contributes to a visceral response is desirable, even if technical niceties are going to hell in a handcart. The fact most shots ended up on inky newsprint, only added to their effect.