I think stop loss is better than you loss all your money, is not worry when you loss chance to get profit with trading but better you use stop loss when your prediction is not running well and you still have chance to get recovery another time with other coin although half of your money from stop loss, but if you keep continue without stop loss exactly on future trading, you will get liquid and nothing you can get after all your assets loss, you need fresh money again to start trading. I think almost trader spot or future always use stop loss to protect with bitcoin and altcoin situation always have bad news and wrong analyze with our prediction.
A lot of people are debunking it with a scenario where "what if you cut your position then suddenly the price increase" that scenarios is really happening but those scenarios are uncontrollable wherein we do not have power to predict it, anyway there is a term re-entry wherein we can trade again if our bias materialize. I'm favor with using stop loss because it is important like what you said because it is the key for us to not lose all of our money. We should learn from the mistakes of the others where they regret their decision because they did not put any stop loss in their strategy.