[ezero]

It’s extremely difficult, especially for an extended time, but it is possible. A lot of “successful” traders start selling educational material after they gain some success and fame.

Out of the truly successful ones, the best example I can think of is: https://qullamaggie.com/about/

Besides the success in trading, what sets him apart is that everything he shares (twitch, blog, tweets etc) are all for free. He is also from Sweden where income tax is public information so you can verify for yourself.

In general, I do think most people should just put their money in an index fund, as ETFs can still be much riskier. But to answer your question literally, yes you are wrong.