Not a thought for women who have breast cancer.
What dangerous and bordering on heretical opinions! As if it matters that women who've already lived through that surgery and associated chemo/radiotherapy should have their emotional reactions considered should they be unintentionally ambushed by seeing someone wearing that brave bit of fun Tshirt in the wild world. 
Yes, I think it's ghastly, tacky, exploitative and normalises that which should not be normalised.
A white middle aged man, who is a medical doctor, thought it would be "a bit of fun".
I don't recall it properly but didn't LOJ approve of some tacky 'sex-positive' tshirt or other as a bit of fun? (Attractive young woman wore the Tshirt, possibly riffing on offering oral sex in exchange for votes. Found it: twitter.com/bindelj/status/1205104789991886848 )