In futures trading, using stop loss will be very good, exactly as you said. It allows us to avoid bigger losses or even lose all our money.
I think both in future and spot, stop-loss is needed. It minimizes the risks of severe losses. In future, it prevents from losing all money. So, it is actually a fundamental tool in trading. People who cares about the potential losses, they will always use the stop-loss in their trading activity.
Some people are too brave to take risks that eventually make them regret it. Maybe we have all heard a lot, "if you don't take risks then there is no profit", yes that's true. But we also have to measure our ability to take risks.
In my opinion, those people don't care or don't understand about the potential losses. If they are aware about this, they must use the stop-loss feature. Even if a trader is brave to take the risks, it doesn't mean he can trade in a careless way. Everyone should be a smart trader, using stop-loss is a smart way to avoid huge losses.