This is pretty much true, but with a catch - wifi is contention based. If two access points are close enough to hear each other's transmissions and they are ope

This is pretty much true, but with a catch - wifi is contention based. If two access points are close enough to hear each other's transmissions and they are operating on the same channel they will share that channel's bandwidth. Wifi was designed this way for exactly this reason, and it's probably why wifi still kind-of works even in large apartment buildings.