Short answer: One of two scenarios...

1. Because the Strata (HOA in Canada) has no idea this is even an option. 2. Because most of them are in favour of it, (most likely).

A big issue with a lot of condos in major cities (particularly new construction) is that upwards of 50% of them (sometimes, even higher) are owned by investors not actually living in the building. It's only on site owners that care about the actual goings on of the space. Everyone else is just looking to make a buck.