You don’t know how much testing was actually done. You’re arguing as if apple did little if any testing, which they might have done or did years of simulations. You don’t know. Sonny Bono would have been happy to have this feature activatedin a ski slope that people want to deactivate. Apple had to adopt a wait and see attitude after this was released.
I'm not sure precisely how much testing was done but given the reports that have come out (this one and others), it doesn't sound like it was enough for this type of feature. One of your earlier comments was that you didn't think Apple would've been "surprised" by the occurrence of these false 911 calls and felt they had adopted a "wait and see attitude." Given we are talking about potential live and death situations and utilization of valuable 911/emergency resources, taking a wait and see attitude and releasing it knowing (not being surprised) something that like this could happen would be inappropriate.