Why do you allow the game window to be manipulated while loading in but not after?

So I just got out of a gong show in which I accidentally pulled down the loading game window off-screen by the majority. I had no intention of doing so, misclick/swipes happen, right?

Well...once the game loaded in entirely, why do you not at least auto-revert the game window back to the middle of the screen? No one can play the game when 80% of the game is permanently locked off of their screen. I could BARELY see the top of the options menu when I pressed Esc to at least see if I could fix it with a different resolution setting or perhaps make it fullscreen mode. NOPE! It's like as if my current settings were the ONLY settings as it was having none of that.

At what point, Riot, did you absolutely INSIST on making it so our cursors are not allowed to go past the borders of the main game client window? Did you not realize the very obvious flaw this would cause for those who might actually need to adjust something? Is this a power trip for you? I had to reboot MY ENTIRE EFFING COMPUTER in a desperate attempt to come back after fiddling with various potential workarounds for several minutes. By the time I got back into the game, everyone was level 10-ish, I was somehow level 2 with a death (even thought I'm 100% positive I never left base) and it wound up being a pre-15 unanimous surrender.

I suggest you actually pay attention to the basic functionality of your game because poor saps like myself shouldn't be forced to subject our teams to guaranteed losses because you can't handle one of the most minor of game settings that is literally a non-issue in every other case of gaming that has EVER been brought to my attention that matches this magnitude of impossibility.

What's the excuse? Dual-screen? So, the type of setup the vast majority of average people DON'T run? Is it to try to discourage people from tabbing between windows whilst in-game? Well, if people have legitimate issues like what I experienced, why do you allow manipulation of the LOADING of the game? You never know exactly how long you have until it pops you back in so why even let people take that chance, purposefully or accidentally?

Really, give me ONE. GOOD. REASON.