Have you ever had the perception passive investments in general (stocks, real estate funds...) generate a very low profit margin?
It stays around 0,6% monthly profit, what means you need 100,000$ invested in order to generate 600$ bucks a month.
For the average investor who is saving pennies or few hundreds of dollars every month on the best scenario, it will take a long time until he reaches somewhere in this financial world.
Therefore, for those who are starting their financial journey just now, maybe it's more advisable to allocate their funds on non-passive investments, what means they won't have a source of automatic profit, but at least they can pursue superior returns to maximize the potential of their money to generate further monthly income.
Once they manage doing this first step, then passive income investments start looking more attractive.
Where did you get this information that an investor gets 0.6% monthly? This is some kind of nonsense. Today, no one gets less than 15-20% per annum. In my country, even a bank deposit gives about 21% per year of the deposit. Now imagine that other assets give it. Therefore, you wrote complete nonsense that does not fit with reality. You should study this issue in more detail.