It's because of emotionally charged response. Leftists largely don't want corporations owning houses, because it's "impure" and capitalist. Rightists largely don't want renters to live in homes that used to be exclusionary on the basis of being able to buy a home. Though there's crossover on the reasons, of course.
Honestly, the argument on the other side seems like emotionally charged arguments due to TDS and not wanting to give Trump any credit.
It seems obvious to most people that institutional investors should not be allowed near single family homes and you would need quite a strong argument to persuade otherwise.