Yes, but what happens when you make an error keying in the numbers? The reason for learning how to do calculations long hand (forget slide rules) is so that you know roughly what answer to expect and if you get one wildly different, you know you've made a mistake.
I agree with Marvin, Like computers .They are only as clever as the person who put the info in
It's a similar thing with marine navigation. There is nothing wrong with making use of the technology, but you shouldn't follow it blindly, in fact there are recorded instances of boats colliding at headlands or buoys because they all set up the same waypoint in their GPS and ignore the other critical things like keeping a good lookout!. Even with satellite navigation systems, being able to manage without is vital - who knows when the Americans will switch their satellites off or your batteries will go flat?
Not really relevant to a running forum but it is a cardinal rule (No sailing pun intended ) that you don't use navigational bouys as way points as all you do is crash in to them, and some of them are very big and hard enough to sink a decent sized yacht
I love the GPS technology when I'm out on the hills and when I get back home to download my route and see where I have actually been, but when it really matters, it's a check, not a substitute for knowing where you are.