I got 20 years in stocks trading and 5 years in Crypto, trust me that you don't want to do day trading you will end up losing all your money
Trading is not for everyone and not everyone can make money from training. To earn money from trading, you have to be patient and adopt some techniques which are not possible for everyone. Like you, there are many people who are making a lot of money from day-trading and there are many people who are losing all their money in day-trading. So here it is seen that some people are doing the same thing but some are succeeding and some are failing it all depends on individual technique and luck.
I think trading or investing depends on the knowledge and skills of each investor, not on luck. But you are right, trading is not for everyone, it can be said that becoming a successful trader is not easy, not everyone has the patience to sit in front of the computer for hours and put under a lot of pressure to be able to make a profit. Trading can be said to be much more difficult than holding, many investors lose in the market largely due to trading, especially futures trading.