Here is one simple reply to this idiocy.
Why aren’t there wide open laws to allow living in tents?
Housing laws prohibit landlords from having unsafe electrical and other utilities, or ceilings that could drop onto someone, or doors that can’t be locked, or crevices where vermin could enter and live. And there have to be toilets and water for washing.
A tent wouldn’t keep out the elements or meet other requirements. So if you allow them a landlord could make money off the suffering of people living in them——not just at a protest but everywhere.