There are two distinct populations (in UK), those of poor vocabulary who use swearing all the time and don't seem capable of speaking in a nuanced way. And those who have the vocabulary to not swear, can still express themselves without expletives but choose to use them depending on the company/context they're in.

I found as a teenager that I'd swear to try and appear cool, and when I lacked sufficient nuance to my vocabulary to clearly express my feelings, and decided I wanted to do better.

I don't really care if you swear - except in front of children (because they have to learn not to swear in the wrong context when they can get in trouble from others who are more conservative) - but unless you demonstrate otherwise I'll assume it's lack of decent vocabulary.

Almost all people I've worked with who've sworn a lot (amongst general company) have had very low levels of education.

I don't really understand the whole "these words are shocking" attitude, eg cunt, people give simple utterances too much power.