There has been many research papers, and the statistics are mostly pretty sad:
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Who are in your opinion these
∼1% of traders? Why they are able to remain profitable? Are you sure you are one of them, if you include taxes, fees, etc.?

Would you cite those research papers you've been referring to? Many statistics, especially in trading, often relies only on a small percentage of respondents and never reached a the vast number of whole day traders. Yes, it is accurate that it is only almost 2% whom earns in trading, even I myself still struggles with it despite of being knowledgeable enough in that field. Trading, in overall aspect, is profitable. It really just an intense gambling of risks whether or not you take a point in either buying or selling. And of course, some intermediate knowledge with reading charts as well and searching for news would be a huge aid, yet the most important would be one trader's risk appetite.
Just a little note, there are DAY traders and LONG-TERM traders, whilst there are also STOCK trading, FIAT trading, and CRYPTO trading. Your 'researches' might be accurate on one side, and could be the opposite on the other.