Can this be true? In most markets the simple answer is Maybe, the number is on the high side looking at short-term results. Long-term studies have shown up to 97% of day traders do lose money. Never forget: That leaves a ton of profits for the rare winners.
Those true winners are those who understand the market and indicator correctly. Most of us here who trade are trading with no rules or conditions; they think they know the market already, but the fact is almost all strategies out there will work if you know the rules and conditions that you must follow.
Those statistics are just predictions, I guess, and most of us here are doing scalping; they trade in short-term 1m, 3m, 5m, 15m, and 30m. For me, those time frames are pretty risky and prone to manipulation.
Everyone should start trading with a higher time frame instead; it's just a suggestion. Focus much on one time frame, but don't forget the wider view because that is what you can use to check the strong or biased trend.
New traders don't listen; experience is the one that could lead them to be profitable traders, so those statistics, I guess, are pointing to newbies, and since the topic talks about day trading for me, if you do day trading, you are forcing yourself to trade on that day even if there is no potential good entry.
It does not work for me, maybe because I still don't have a proven strategy, conditions, and rules that work on a daily basis. But I have a good strategy that works for me; I already filtered out all my bad trades and created my own conditions and rules. I focus on a 1-hour time frame and use a 4-hour time frame for momentum. I only made 1 to 2 trades a week, holding a position sometimes a day, but it doesn't mean I am a day trader because for me, I only trade if I see a potentially high-probability trade or quality trades based on my past experience.
I hope anyone here would be able to focus on one strategy, study it, and then filter out all bad trades. It would be much better if they journaled their trades and did backtesting. The replays on TradingView are very useful. If you have a visa/debit card, you can take the trial, but don't waste it. Spend much more time studying your strategy until you filter them out. Risk management is also very important; always keep your risk low. I know those who keep losing end up overtrading because I experience the same thing. So having risk management will keep you stay alive and risking low.