"Moving a fire station" is expensive. You make it sound like it is moving a bike rack.
Plus, they may want to keep the fire station close to a few of the dumps on Welch.
I'm well aware that it's expensive. If they were serious about converting the area into a ped mall, it would be a multi-million dollar project to clean it up, add retail and restaurant/bar options, add apartments, etc. If you're already repurposing, rebuilding, and building new, the FD could be part of that. Obviously it's not going to happen overnight, if at all. But it's kinda fun and interesting to discuss options, as far out as they may seem at times.