Uses for Google Fit?

I had been using Runtastic for adding workouts. I tried to run it when I swapped my exercise to Pokemon Go walking and running, but it'd freeze, so nothing would be tracked. I heard of Google Fit, and it worked without freezing Pokemon Go.

I decided to try and sync it with MFP, and Google Fit picked up MPF nutrition information.

My problem is, MFP isn't picking up my workout calories with Google Fit. Is it supposed to or did I make a false assumption that it'd give me a calorie adjustment? If so, what's the point of syncing with Google Fit? What do the rest of you that use Google Fit use it for?