I've been on the receiving end of this insult a few times recently and I find it really rude.
I have the same 24 hours of time on my hands as everybody else. If I happen to manage it well, enjoy being creative, and prioritize what is best for my family and myself, it doesn't mean I somehow managed to pluck more hours out of thin air than anybody else. I'm organised, not privileged with extra time.
Like many other parents, I have 2 energetic children (1 not yet at school), run the household (all house work, budget, anything organisational) due to DH's long hours and erratic shifts (he's great when he's home), and volunteer for several organisations. And yet, if I share with people anything I've enjoyed on the creative or self care front, I'm told I "have too much time on my hands".
My feeling is that it's a statement designed to shame and ridicule people but I cannot fathom the motive. It's on a similar level to the old classic, "I'm not being funny/racist/mean but..." and proceed to be just that. Just without the disclaimer. It's usually excused with "I'm only teasing/ winky face/ I didn't mean anything by it." Erm, well, perhaps say what you mean and mean what you say then.
Does anyone else have experience of this and how do you respond? In reply to the most recent, I just said, "I was probably working on that whilst you were doing your [insert crafting hobby]."
AIBU?