What are realistic Day-trading returns?

I’m encouraging professionals to answer, but everyone is accepted to speak up.

I have heard that it’s possible to make a 1% gain per trading day in the stock market. People are supporting this argument because often times independent traders are investing small amounts of money (thousands to lower million dollar range) and therefore say it’s advantageous because of liquidity reasons. However, I’ve also heard that it’s ONLY realistic to match or be in the ballpark of the market return which is roughly 10%. Therefore making 100% annually is obnoxious and ignorant to expect because even Warren Buffet can only make 20%, and that’s considered to be a world renowned return, nearly unbeatable.

I would really like an expert or industry experienced professional to let me know if day trading and making 100% or anything significantly above 20% is realistic to make in the stock market. I don’t know who’s right, maybe both parties are right? Please let me know.