You don't want your readers to think, "Yeah, right, that'll never happen."
My brother-in-law is a nurse, and he can't watch medical TV shows. It annoys the snot of out him how wrong so many of the details are. My husband is the same way with anything computer related, and I notice the screw-ups in publishing and graphic design. Odds are you have your own area of expertise, and you notice when a show, movie, or book gets it wrong.
The number of authors who goofed by putting a safety on a Glock is pretty high. And readers catch those goofs.
All stories in all genres get bonked on the head when they lack credibility. Readers don’t believe a character would act a certain way, or they doubt a situation would ever happen, they find details that are flat-out wrong, or they call BS about how something is handled.