You are using the same logic as those who kept the franchise restricted to the property-owning class. Parent is rightly mocking you for it.
The water treatment plant often will be voted on, because it will often be financed by a bond issue or levy that requires voter approval.
The apartment complex is the only one that doesn't fall into either of those types of projects, and this is one that gets exceptions because it is to solve a problem the local area is having by directly addressing that problem. They need more nearby housing, so they make exceptions for housing projects.
Not many towns have found their AI needs are hard to meet because of the latency over the internet to their AI provider's datacenter, and so need to get a local datacenter built.