I don't think you should take that as a main/sole argument against using a pump, there are many other pump manufacturerers oit there. I fir example am very happy with ma Dana i. (Apperently unlike the Omnipod, which seems very odd to me tbh) it has some saftey functions built into the device itself, so even if the controling software on my phone fucks up and doesn't respect it's hard limits the pumps driver still will. Unlike Apps or any management software I imagine the driver to be quite simple and thus less prone to errors like that.