Why do we read superhero comics as opposed to Star Trek?

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Star Trek Fan and passionate comic fan whose favorite heroes are very science fiction based (except Dr. Strange) Iron Man and FF.
So I get where the OP is coming from but it seems more true over years that, from its origins to today's most engaging stories, SuperHero fiction is exactly what wikipedia says "speculative fiction examining the adventures, personalities and ethics of costumed crime fighters" or as someone once pointed out if Science fiction is the fiction of ideas surrounding science and technology then SuperHeroes are the ground work for thinking about power, crime and consequence in a modern age of new powers and situations that are extra-ordinary.

We see this in the pulp origins of supers fighting crime that regular cops (read as regular society) are not able to deal with. And while Star Trek and other sci-fi deal in ethical situations and crimes most often these involve ideas inherent in the tech or conduct of science not the human conduct or motives of people given power.

So what is it that we are talking about when the topic of wish fulfillment comes up and is not the but main driver of Science Fiction?
I would say it is still Justice. The idea that power be in the hands of the righteous or that there is a balance in the Universe for the abuses of power. That Crime does not pay as they used to say in the old Shadow radio serials.