The conclusions are that day trading and gambling lead to losses! Here everything depends on luck, and nothing else! I'm not comparing trading with sports betting or poker, I'm talking about casino...

Sports betting and poker come under the casino too. Be specific!

Day trading is also a 50-50 win loss game. You can have some stocks that you buy sell and make profit because you know its trends but it is tough to find such because you need to monitor them everyday and read charts, lot of works for those who are trying to get rich quick and so they dont go for it but attempt dice games where they eventually lose and thus have the mindset that day trading is also gambling, which is not completely correct.
Skills can help when trading for weeks or months, but intraday trading is not subject to technical analysis! I'm talking about it because I was losing my money trading intraday!

Because you lost money on intraday does not mean that TA has no part in it. The two are completely different statements. You can make or lose money but gambling on EV- will be a loss without any doubt. Gambling on EV+ games have a chance of winning by skills.