I'm sure she could've used many examples of vocab names she dislikes, other than Treasure. But those names could've had bearers with mothers, too.
I don't think Cait was that harsh. She used one harsh word about Treasure -- "atrocious". That is an extreme word but perhaps she has extreme feelings about the name? We all have a few names we really, really dislike. Every day I see examples of people being ruder than Cait was just there. Many regulars tap into the class and education stereotypes, speaking very snobbishly to whoever likes a "bad" name, and no one bats an eyelid.
If we all got "defensive" every time we saw the name of someone we knew, we'd all be arguing constantly. You'd be as well just separating the name from the person a bit, as long as the comments aren't very rude or personal (which Cait's wasn't imo, just blunt).
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"There are few more distressing sights than that
Of an Englishman in a baseball cap
Yeah we'll die in the class we were born
That's a class of our own my love"
♥Elinor♥