When it's stressful making money you know it's going to be ten times worse when you lose.
Losers tilt puts traders in a very bad emotional state where they're looking to jump into a new trade immediately or double down on the old one that they just lost. This inevitably leads to making poor decisions and jumping into non-profitable bets to "make it all back" as quickly as possible to relieve the emotional stress. That's a good way to spin out and lose everything.
I will only ever trade like this when there is an obvious event coming up and I'm fairly certain which direction we are going. But even then my best trades are the longer swing trades where Bitcoin is grinding the bottom and everyone is bored and losing their mind and I just go long for a month straight. Day trading is an absolute shitshow.