I think that is important to gave them some kind of education about how important the stop loss feature for us. It is just made my life easier since its invention . Also if somebody learn about risk / money management in forex they will understand how much importan the stop loss feature is. But some traders have their own valid reason like more control to their trading.
You can find a lot of news or fx education site which implied how important is stop loss but they still don't care. Not all don't care but there are a lot of them. And about the last reason i agree with it, some trader have their own strategy one for the example is carry trading strategy which even doesn't require much attention but with SL you may screw up the plan.