They ILs are really good at weeding out idiots so extreme you don’t want them renting a house from you. Their system works.
There are conservatives who would not be able to engage in the type of business they do if everyone followed their advice, i.e. people who buy rental property would have no renters to rent to if everyone followed their advice and purchased their own homes.
True conservatism envisions a society where thoughtful people make very different decisions. It is sometimes a very good decision for someone to rent. It is good for conservatives that own rental property that some people need to rent that property.
However if you listened to the words coming out one side of the mouths of some conservatives you might wonder why that side is undermining what the words coming out the other side are saying, i.e. it can't be the case that it is both stupid for people to rent and a good idea to own rental property. If it is stupid to rent and everyone is rational and decides not to rent, then owning rental property would be stupid.