Can be pedantic about it all you want, there is a big difference between optimally spreading reclaim engies, scaling power, and utilizing mex bp while managing unit fronts at min 7 vs attack moving 2-3 engie facs on the giant reclaim pile at min 25, and putting more engie stations next to your gateway producing boys to scale mass fabs. There is no map where you're making teleport where your generic scaling isn't done unless you have 50 mexes to manage.
What's the inventive strategy of UEF teleport btw? Stealth gen and tml base? Billy + T3 + teleport is insanely powerful, it isn't an option to be allowed. T3 + teleport is a meme gimmick that I have only seen in games that were won 10 minutes before. Billy + teleport carries vastly more utility and makes UEF teleport legitimately viable in late game.