I have made a conscious effort to reduce swearing, which has brought my swearing down to near zero, both online and in real life conversation.
I have found that it streamlines the ability to make a point. A lot of swearing is simply thrown in out of habit, and if you remove it, all you do is make your point more clear without losing anything of substance.
I think for many people swearing is a "filler word" in the same way that "umm" can be. I have also worked hard to reduce my other filler word use. My goal with both of these is better articulation.
The next effect is that swearing is normally viewed as an extreme use of language for an extreme situation, and when you don't constantly swear the times that you do actually conveys how notable the situation is.
Then it isn't a filler. I never said I don't swear, but have greatly reduced it. One effect of reduced swearing is that when swears are used, they have more punch.
I'm not sure why you're so invested in debating that people who habitually swear won't insert swears into unrelated thoughts, but the only support I offer is to listen to someone who habitually swears speak. I don't want to sound like that, so I make the effort not to.
My choice on how I speak and type doesn't impose anything on you.
Trying to self-improve in a method that, regardless of its objective effectiveness, makes you feel satisfied and has no discernable effect on those around you?