I can understand this view very well and have no problem with it. If a player just wants to play for fun, it's certainly a good device. That's OK for me.

The problem I have with it is that I want to improve as a player, that I want to use it for training. And depending on how intensively you do that, you will sooner or later reach the limits of the device. For the serious player these limits already start with the possible time settings, which are not flexible enough.