Not making use of stop loss doesn’t make you a gambler. Some people are not just interested in making use of stop loss. We have some traders that are always online to monitor their trade, so people like that might not really be making use of stop loss, and they going to be making money from trading. Trading is not all about stop loss, you might be making use of stop loss, and you still going to be losing in trading. Am a trader and I don’t use stop loss frequently but that doesn’t make me to be a gambler, and it doesn’t mean am greedy.
Assuming, you are a skilled and good trader. Maybe you're not taking too much risk, so you don't need a stop loss. But if a trader uses high leverage, he should be aware of the risks. Because the higher the leverage, the higher the risk. I believe, many traders don't use SL, because they trade order close with small profit. What I mean by gambling here is that they have no fixed limits. For example: gambling offers a much higher multiplier and trade has the same potential.