If some app removed a function that you depended on in a newer version, you'd want to go back to the old version. At that point, you wouldn't be able to just use the app.

Then you'd have to spend your time waiting for the author of your walled-garden app to fix the problem or spend your time finding a different app to use and then spend more time transitioning to it.

In any case, I think that the trade-off needs to be acknowledged for what it is. You're trading your freedom for convenience. Of course this is the American way, what with all the overflowing amounts of freedom that we have.