Steemit has an excellent system of validating quality content. So while quantity of crappy material might present a certain level of pain-in-the-ass for curating new stuff, on the long run it might only add to the quality of the content. Keep in mind that Reddit has an astonishing amount of low quality content yet if you don't want to see it you can avoid it completely.
RE: Steemit Activity Skyrocketing: Good or Bad for Content Quality?