I think it depends on the audience you’re writing for. Are you writing for a Star Wars audience? Or a Star Trek one? Soft sci-fi? Or hard sci-fi?
If soft, then you don’t have to do much research. But it wouldn’t hurt to do so anyway. It’s not uncommon to pick up on a sliver of scientific information and then blowing it up and exaggerating it to entertaining proportions. There’s a Dwayne Johnson movie called Rampage. The movie focuses on CRISPR; an actual technology used for gene editing. Now, to my understanding, in no way, shape or form can it currently be used to create giant bat-wolves, boar crocodiles or gorillas with hyper-regenerative capabilities. But it’s cool, so…
Not the greatest movie, in my opinion, but I do think that there’s something there to be learnt.
If you wanna go hard sci-fi, then you gotsta do the research. The more accurate, the better. And you might find something very interesting in your research. ‘Reality is stranger than fiction’ is a saying for a reason.
Now, I don’t think it’s an either/or situation. I think it’s a scale. The more entertaining, the less accurate. The less accurate, the more bullshit which might annoy some people. And some people might actually find the scientific accuracy entertaining. So again, it depends on the audience you’re writing for. And due to your self-professed laziness, you might be more comfortable and inclined to writing soft sci-fi. But it’s up to you.