We live in a very volatile time these days. Unfortunately, it isn't just the weather we have to worry about anymore for emergencies, which in itself is a major issue. There are so many things that can knock out ground networks you really have to ask yourself; what if? What if an emergency occurs and and help is unreachable because I simply cannot get a signal on my smartphone? The simple answer is this, whatever the emergency if you cannot call for help immediately and get it there as fast as possible the situation gets worse by the second. People can die during these seconds, especially when something like a heart attack or even worse is concerned.
So, in short without a satellite phone you will be stuck without a way to call for help when an emergency happens and ground networks are out. Even if there is an emergency and you are thankfully okay it is nice to be able to at least call your loved ones and let them know that you are okay.