It is too careless if futures traders do not set stop-lose because we know market movements are difficult to predict, therefore people who are too reckless with SL have ignored their risks.

I've seen in X and this was widely reported if I'm not mistaken he was liquidated $1M when he was sleeping, because he forgot to set a stop-lose.
Futures trading is most avoided by me because I know the risk is so great that I don't want to not bear it.