"space magic" indeed.
Because I feel like that's what most mass-marketed sci-fi comes across as a lot of the time.
Good sci-fi inspires you to think about the possibilities of technology, exploration and culture. I feel like modern, average sci-fi either takes these things for granted and treats them like magic, rather than posing interesting questions about what cloning would mean as us for a society....or it does so deeply in to these questions it becomes too much for people.
For example.....Aliens vs. Black Mirror.
Aliens is a fun sci-fi movie with action, hostile lifeforms and the struggle to survive against a superior predator. It doesn't ask deep questions about how megacorps with interstellar reach have changed society, or how the ability to travel light years in one life time has informed the human race. It obliquely references these concepts to set the scene but it doesn't really explore them. (Not that that's bad, and not that Aliens is average sci-fi to me. It doesn't go deep but it's got all the right components for a sci-fi thriller.)
Black Mirror, on the other end of the scale, goes deep with its questions of what technology might do to the human race and our interactions with each other, down to the level of "how could technology ruin a marriage?" Fascinating to think of the implications but not always "fun" or "thrilling." Or even believable.
In the middle of those two things I'd put a lot of written sci-fi, both classic and modern. Ray Bradbury, William Gibson. Stories whose premise and execution makes you think about how the world might be different if X, Y or Z were true. One of my favorite sci-fi stories is about some colonists who crash land on a planet with special radiation, that causes people's life cycles to accelerate by 1000%. So people are born, grow up, grow old and die within a week. And it kind of explores how they adapt to that reality and eventually seek to escape it.
(Star Trek aside, but I felt like DS:9 really underplayed their alien cultures compared to previous ST series, even the original. Bajorans, Kardassians and parts of the Dominion didn't have the strong cultural and alien identity of the Klingons, the Vulcans, even the Borg. Interesting non-human cultures where you can explore different ways of thinking to me is the entire reason to have aliens in your sci-fi.....other than to have something to shoot at, that is.)
So yeah, I think people dismiss sci-fi sometimes because a lot of modern sci-fi is a little lazy and has started to treat sci-fi like fantasy. I feel like modern sci-fi often doesn't explore the ideas that make it sci-fi to begin with, so much as use it for the backdrop of your garden variety fiction themes. Love, revenge, redemption, discovery. (Take the Minority Report for example. A pretty good action movie with a sci-fi backdrop but that only really pays lip service to the ideas it brings up rather than exploring them. Sci-fi there is just a setting for Tom Cruise to win and police to fly around with jet packs and ridiculous lights on their helmets.)
I'm sure a lot of it is a fear that going to deep on an idea will scare audiences away, or bore them with the details. But to me the details are what make sci-fi, sci-fi. If you don't talk about the details that make your world different from mine, all I really end up seeing are actors in funny clothes with a lot of make up and a shit load of CGI going woosh.
It's like if I want someone to lean that hard on established tropes they feel don't need to explain, I'll go do fantasy.