My question is why not just leave it pretending to be opened, then open it when you select it? Leave the dot on the dock, leave it in the alt+tab list, but don'

My question is why not just leave it pretending to be opened, then open it when you select it? Leave the dot on the dock, leave it in the alt+tab list, but don't actually have the process running. This seems like what they are actually trying to achieve: you remove all actual strain on the computer without breaking any promises.