What you are telling is true but i think if you trade with StopLoss, then most of the time you will see that your stoploss will get triggered and then it goes back up so using stoploss is not good always it should be used according to the coin which you are trading.
You should study your coin first as to its volatility so that you will know how much percentage it is capable of swinging and then turn back up again. After all, it's one of the things you should do when you are doing technical analysis. When you observe that in the previous scenarios, they would sell below support then put your stop loss below that percentage so that you can avoid being triggered of a false break out.
If you are trading in BTC then i think using stoploss is not benefit as you know that if today the price is down then some time later it will go up. BTC price swings both side so many times in a day that stop loss will almost trigger most of the time.
I don't think BTC is an option to this because if you only hold your coin when it reach almost $20k then you are at a huge loss now unlike when you have a stop loss at maybe 10% then you maybe already had profit now or even at a break-even. I believe that stop loss should be applicable to all trading pairs without exception.