The only thing that occurs to me is protecting privacy of ambo staff ( i.e. you need to know where the cop station is but you don’t want randos going to the ambo depot for treatment or because of some perceived slight against one of the staff).

The other realistic reason would be that there’s restricted drugs stored at some (most?) of these depots and so, while you need some level of openness about where the depots are, making all those addresses available publicly would probably be perceived as a major risk. Although you can get it now, there’s at least a barrier.

Likely there’s a bunch of politics wrapped up in this and the lack of comms about why its restricted info is shite but I can see why it might be refused.