Well I mean looking at the play, other player is in check and has to defend the king. Depending on the response, it could take out the queen. Overall, the player is already in a really shit position. Taking a chance could backfire or help come back from the brink
Sub 1k yeah I could see the gamble paying off, but beyond that? The moves at the bottom of the pic tell the tale- Bishop to c5 takes knight, pawn to d4 blocks a check, likely bishop to d4 confirms the mate. Even aside from that, its something like a 13 point material advantage, along with white having a locked up rook. Even without the blunder that's a rough situation.