The whole point is that you shouldn't have to download a third-party app, it should already be a feature on your phone.
Analogous to how organ donation should be opt-out instead of opt-in.
Analogous to how organ donation should be opt-out instead of opt-in.
And it's not like this is a readily producible resource - people die on organ transfer lists precisely because other avenues of acquisition can't meet the necessary levels. It's a question of priority IMO, maybe not philosophically ideal but in a cooperative society compromise can save many lives.