There seems to be a misconception of the idea presented here. The main issue that police has also been dealing with is the fact that players like to hang around bears, resulting in countless bear calls at times, which overwhelm KPD when they have other duties to attend to. Implementing this idea would solve that by taking away that duty from KPD so they can focus on other matters.
Moreover, there also seems to be a general dislike to this due to the fact that KPD takes quite some time and several promotions to be given a tranquilizer. You must know, though, that the tranquilizers handed to EMs can't be used on people. It's a tool that can only be used on animals.
There have also been mentions of Midazolam. However, this tool is only used on humans (The reason why EMS has been using it on bears is because there was no other way for them to deal with that. Realistically speaking, midazolam is not enough to actually put a bear to sleep). Furthermore, the issue of range also comes into play, as so far, EMS had to get up close to the bear, risking their own integrity (which they wouldnd't do it in real life due to obvious reasons).
Finally, not all EMS will receive this tool. The veterinarian role is exclusive to those who have passed the Vet certificate, which has their own set of guidelines, limited roster slots, etc.; just like police sergeants and above do. In essence, what this suggestion aims to do is to take away one of the burdens in emergency calls from police officers to EMS, taking into account the overall negative comments in regards to bear calls from previous forums posts.