He blew up paper trading demo accounts and trading real money is at least 10 times harder than demo trading... you have to ask what chances does the average person have of making real money by day trading?
Oh boy....I trade 300.000 E-Mini S&P contracts a month and you won´t believe it: I am still "profitable".....LOL! Your math is fundamentally "flawed" and your "thinking", too....
All traders have losing or break even spells. If you hit a 3 month period where your trading is breakeven but you are paying 40% a month of your account in commissions then you will be wiped out, there is no getting around the maths. Thinking you will always be profitable enough to cover 40% commissions every month is naive newbie trader thinking. Even paying 20% per month is way too much. The OP can keep repeating his experiment, in the end the commission from averaging around 10 trades per day (on 5+ lots) while trading a very small account will always get him in the end.
And because that's how HFT makes money, and everyone thinks they can do the same... I'd rather wait and not do anything for 2 days than try to take 2 ticks 20 times a day...
I think there might be another reason as well.---The quicker someone can get in and get out, the less chance they feel they can be hurt.