who had the bright idea to maximize the app without actually maximizing it?
how much apps do you know that maximize their screens by calculating the screen size, then resize to match?
what do you think is the function of the Maximize button?
can you understand how IRRITATING it is for a user to click the Maximize button (assuming it will RESIZE an APPARENTLY maximised window, so that the window can be moved around) and then realise that the window will remain in the same size?
PLEASE UNDERSTAND HOW IRRITATING THIS MISCONCEPTION OF YOUR IS.