Is the 4% rule legit?

I don’t understand why every sub on Reddit has literally said using ETFs and funds like Yieldmax, roundhill, Neo, etc are taboo. It’s to risky to even think to add all that “yield” to your portfolio. Your money will be gone with the market or vanish. Yesterday I got told it’s impossible to have a portfolio with 62% which I have and my portfolio only grows and isn’t disappearing? So what is it? I googled it and it says in order to have 4% yield you need $300,000. But yes that’s stocks and blue chips: lol add msty or PlTY and your annual return sky rockets. I use stability, growth, and hold stocks to counteract the red with my yieldmax, roundhill, and Neo. It worked so question is it possible to have more then 10% cause I see that’s the most “one” should surpass before it’s to “risky”. No sleep so don’t hate the way it’s written. I have downs And market syndrome. ME SOWY