For me as a trader we have to set stop loss so that we will not losing more money because high chance that it might go down further. You don't want lose money right so it is better to set always stop loss when trading cryptos.
I agree with what you wrote, the stop loss for me is also a way to reduce excessive losses especially when things are not going as we expected. You try to limit your losses, and at best you can buy back when it has gone further down