This is the product of Valve's unnecessary and, quite frankly, ridiculous forced settings (FOVs that aren't even set to at least 60 ?_?). Adding that up to their apparent lack of consideration towards the community who is trying their hardest to get the game to thrive (and their staff that only shows up to make a single "funny" post in a thread that shows how to get around those exact same ridiculous forced settings, instead of addressing bugs and issues with the game's memory leaks, for example) it "forces" people to find ways to get around those same restrictions so the user experience isn't as bad as it is right now.
This wouldn't be necessary if they weren't so secretive and reclusive about their reasons behind locking these settings instead of letting them be tweaked to a reasonable extent by anyone.