Even if this is true, those communities always have the class of people moving through and that class deserves a vote, even if the individuals within it are changing. For instance, take a university town with population of 100k, 25k of whom are students. The students themselves come and go, lasting about 4 years each, but it still makes sense that 25% of the vote each election should go to the student community overall. This doesn't happen for a variety of reasons, but some of them are the sorts of artificial barriers like voter registration that depress the vote of these sorts of communities.

As long as people can't afford to buy they're "less invested" so no reason to address housing affordability... In the modern housing market that's a self fulfilling prophecy.

How about that principle of one person, one vote.