I believe GP is referring to "regular folks with jobs" who buy houses on the side to supplement their income (as opposed to investing in funds).

I understood this.

But there's been a general backlash on the internet the past few years about giant pools of money like Blackrock buying up housing supply. I don't think it's that different from your typical "mom and pop" real estate investor buying up homes to rent out. Ultimately, much of Blackrock's funds are held by regular mom-and-pop investors.