well the thing is that as soon as you try something like even reducing the profits of landlords, they have the power of the state behind them. and if you try to fight that legally then the state will just use violence in the form of the army or the police to protect private property. at which point, if you're now more or less in insurrection against landlords, you may as well go the whole way.

you can't just reform this one small thing away, because it's a whole part of the system of capitalism and private property that the state literally exists to uphold at all costs. so you can't unless you have a revolution basically