Yes, convenience frees you up to pursue something else, but I've felt that it takes so much willpower to pick an activity you know to be of value to you (like exercise, or reading a book) over something immediately gratifying. Another thing I've been thinking about, related to this is that our value systems and/or attention span have been weakened severely by the torrent of information and immediate connectivity these days have.
I remember this quote attributed to G. Michael Hopf: "Hard times create strong men. Strong men create good times. Good times create weak men. And, weak men create hard times." What if this pursuit of convenience is making us weaker, and in the long run, blind to what should be pursued with the time we free up?