No one is allowing or disallowing specific groups of people, the market decides.
Is Ferrari "not allow specific groups of people" (I am in that group) to buy their cars by not pricing them the same as a Honda?
Is Ferrari "not allow specific groups of people" (I am in that group) to buy their cars by not pricing them the same as a Honda?
To use your example, it's as if we were to restrict car production to mostly only Ferraris. And then if someone can't afford a Ferrari, we tell them to buy a Honda - but there aren't many of them to buy.
My town is being more strategic about it. They allowed businesses to come in first and expanded out the robustness of the local coop's electric grid and only then did they allow appartments and they are doing them in stages to make sure the area can handle it. This is important in an area where not everyone is even hooked up to the city's water supply or has access to city sewage.
In areas where the power grid is struggling to keep up with demand, the municipality will need to plan with that in account. If you expand housing in an area where you've made driving the only transportation option, that will straightforwardly lead to more cars on the road. And so on.
But at least in my area, municipalities largely seem to be trying to keep housing density at or below the level it's at now, which is a problem when we're facing a housing shortage.