Oh, you're right. But still:
"you are being deceitful" 1 result "you are being dishonest" 42 results
... if I tried them all they might add up to over 100, but still. It's hard to make the case with a few searches, maybe I shouldn't have started this ^^ It's just something I notice constantly. E.g. half of the time, "I'm not entirely sure I agree" is a sincere statement, the other half it's just "I disagree" in more words that are supposed to give an impression of depth that isn't there.