If you want to see a group of writers go just crazy about something, start a conversation about whether cussing is appropriate. Asking this question in a group of children’s books writers or religious writers is like adding jet fuel to a bonfire. Maintain minimum safety clearances at all times and wear the appropriate protective gear properly. Better yet, Run! Run away and hide!
I will freely admit to you that I am one of those prudes who does not want bleep-able language in my entertainment, so I don’t use it in my writing. I’m not even a fan of “made up” cuss words. Once the meaning of those fake words is established, you lose whatever you thought you gained by making it up.
If other artists and writers feel the urge to use “technician talk,” that’s up to them. I only control my own pen. I might not enjoy the work as much as I would have if the writer had kept it clean, but I will only make suggestions. You control the output from your pen.
So, how did the paragons of speculative fiction do on their potty mouth tendencies? That varied a great deal, actually. There, at one extreme, was Gateway, whose main character was apparently wholly incapable of uttering 10 syllables without an expletive. Taking the middle ground was Ringworld with its made-up swear words. I don’t recall that any were completely clean. Even the Harry Potter book Goblet of Fire had NSFW language, or at least language not suitable for kids, IMHO.
So, to have good speculative fiction, do you have to get some words from the verbal sewer? No, but apparently doing so is not a hindrance to greatness.
Ultimately, you get to choose your vocabulary, but for me, I would rather be creative than crass.