Lol, it's not stupid.
If you think how many times you've had to uninstall TDU, trying to fix various issues with it, I can tell you for sure that I've had to at least 10 times. If I was to have this problem with Spore, I would only be able to uninstall it 4 times, after that, then I would be stuck with a useless disk.
Even just adding in some RAM means it has to reevaluate your system, and uses up one of your installs, as would any other hardware installation.
The main problem with it is you're basically simply renting the game from EA, rather than actually buying a game like you would from any other publisher :(
After you've upgraded your computer 5 times, or installed it on vaiours computers, or combinations of this, you're left with a disk with a great game on, that you simply cannot use.