I loved reading this! Growing up, even saying “stupid!” was looked down upon. I only really started to embrace the beauty of swearing while at university. It used to shock a lot of people because for some reason, I didn’t look like the type person who swears (whatever the fuck that means).
One of my best friends who’s always been a lot more comfortable throwing around the f-bomb, taught me to be more comfortable with it and it changed my life. It still appalls my brother when I let it slip infront of him, but I have experienced an overall increase of self-esteem and confidence in certain situations. It does make me feel more in control somehow.
Another aspect of it is that it does help break down barriers quite quickly between friends. It instantly changes the vibes of the conversation if someone knows that you’re perfectly fine with them swearing and are likely to do the same too.
Finally, as you said in your conclusion, too much of anything is bad. I completely agree — when someone swears too much, especially too early in an encounter, it completely puts me off. It makes me feel that this person hasn’t taken the time or consideration to know if someone is comfortable with that yet. Additionally, it puts you across as someone who is putting on a front because they’re uncomfortable or hiding something (in short, not a good vibe).