Of course you will renovate it and rent it out to the top earners. You know what else? You'll ask for the highest deposit allowed since it doesn't cost you anything and filters out the problematic tenants.
You can do it differently when you are on the other side of the table. However you'll soon find out that most of these things are done for a reason.
It's pretty obvious that it's done for gatekeeping. Besides that whole insulting idea that lower middle class will trash your property.
Much more important question is that who has the right to live in a city. Maybe most of the people living in there, people who give that city its purpose and take care of it, want older cheaper flats.
Maybe these companies misjudged their customers and are just forcefully trying to feed on peoples need to live somewhere.
It may be insulting to you, it might be true that you or the people you know would never trash a property and still at the same time some people in your demographic might behave like that. Since it's zero cost to exclude the whole group, that's what the owner is going to do.
People with money are not perfect or of inherently better character, the banker that does coke on Friday is just less likely to use the floorboards as kindling compared to a junkie with more congruent background.
You can do it differently when you are on the other side of the table. However you'll soon find out that most of these things are done for a reason.