It is a standard socialist slander that “greedy businessmen” put “profit” ahead of the “innocent lives” of the working class. I’m not seeing how your argument is any better than theirs.
While lives do have "prices" on them, and while some of us are worth more than others of us, it is unseemly to make it so obvious that protecting the marketing strategy of a multi-billion dollar company is potentially worth more than the lives of innocent people.
What makes it worse is that it wouldn't really put a dent in their sales if they did break this phone open, but it might very well keep people from getting killed in future terrorist attacks involving the dead terrorist's associates.
I would like to get into a deeper discussion of the morality involved and talk about Adam Smith and Edmund Burke's take on wealth and social foundations, but that would expand the scope of this discussion too much.
My point in bringing it up is that there *is* a moral component to business, which has mostly been lost since society has moved away from it's Christian based foundations.