The argument is they did it to "focus better".
You can not do something with the pretext of better focus and then do several other things that break that focus -- whether you were planning to do them anyway is irrelevant.
To put it in some (arbitrary but isomorphic to the argument) numbers, increasing your focus by 5 points and decreasing it by 20 still leaves you with a decrease of 15. Yes, it's better than decreasing it by 25, but that's not the point -- it's a minor pedantic correction. A decrease of 15 is hardly "focusing".