I wholeheartedly agree. This blend of criticism consists of blanket dismissals of all things staded and even the acknowledging that the person is worthy of consideration or engagement, regardless of what they say or do.
The accuser feels the need to demean others, and for lack of any reason this is what they grab hold onto.
Obviously I hope you can tell that's thick sarcasm to illustrate a point.
Viewing swearing as "dumb" and thus people who swear are "dumb" is a really easy way to openly okay associating a whole group of people that may swear often as "dumb" or to selectively apply that standard to them.
You yourself are perfectly free to choose whatever words you would like to use; I am perfectly free to find language policing and censoring repugnant.