Having worked a lot in a rental market with a very active housing subsidy program, I agree that the administration of such programs is an actual nightmare, but you really are missing the point I think.
Start with the assumption that people need to be able to afford a place to live, and that a full time job should be able to achieve that. Do you agree?
Now, if we both agree that a housing subsidy program is an administrative nightmare, what's left? Simple: Regulating prices on the housing market.
A subsidy is a nightmare to administer; is subject to corruption, mis-targeting, abuse, and extreme wait lists; and drains public resources. So why do we do it? Simple: Because the real estate industry has lobbied the government to pursue this as a means to address housing inequality. Rather than being told that the earnings of their investment properties will be capped by regulation, the government is writing a check to make up the difference.
So now, after years of waiting, a single mother of two might get a 3/4 of her rent paid by a subsidy. The apartment needs to pass ridiculous inspections which are conducted historically by specialized contractors who benefit from failing due to re-inspection fees, and they will fail an inspection because a screw is missing from a light switch cover, blowing up a lease deal and elongating the timeline for a subsidized move-in by months. It sucks for the residents, and it sucks for the landlord from a administrative/management perspective (mainly dealt with by hired management), but at the end of the day, they have a government-guaranteed rent payment for a greatly inflated rent market. Coronavirus cut your tenant's hours?! No problem! At least 3/4 the rent will be paid, and the margins are still profitable.
And we wonder why wealth inequality is growing in the US! This literally inflates the rental market by creating more demand for overpriced housing than exists, by creating a class of people who can afford it only through a majority subsidy. It also encourages investment property purchases by doing so, in turn creating more competition in the buyers market and causing price inflation there as well. This also has the effect of keeping more people renting instead of being able to buy.
In conclusion, PEOPLE NEED HOUSING! Real estate industry doesn't need subsidies. Yes,that includes private landlords with investment properties. Someone else's housing or health care shouldn't be an unregulated investment opportunity if we care about the well being of the people.