Especially when those 2nd, 3rd, + properties are being used as passive short term rentals. Observing the state of the housing situation “Hmm there aren’t enough homes for normal families to each have a chance, I should turn this extra property of mine into a vacation rental.” does this make said person a POS?
Ok, thats a bit different, if the house is somewhere where noone wants to live anyway (and if they want there are enough options available), then it really is ok morally, at least for me.
One could argue that the space should be used for farming, but that depends on how big the property even is if that makes a difference at all.
If it has a really big property with lots of grass it would be a good thing to rent that part out to a farmer. If it is more of a forest its probably better if it stays that way.