>You shouldn't need to "think for yourself" as a prerequisite to have usable tools
This is not true, we are not all the same. For example my eyes are bad, and one is worse, so I prefer one side of the screen more, I want to put my important stuff like notifications on my good side, I do not need a pretend UX guru to tell me how to have my notifications and hard code them. I also prefer to change the keyboard layout around so I can do most used keyboard shortcuts comfortable with just my left hand. I don't care that the majority things the keyboard layout should look like, I am more comfortable in my way where a GNOME user will not even consider that it could be possible to customize the keyboard layout or change keyboard shortcuts, some big ego dude decided for them.
Let's assume you are right and defaults could be good for 99% but IMO are great only for 40%, I want great, not good or OK, but I don't want to force my preference on others , just wish others won't remove functionality because it is used by less then 50%.
EDIT: I think I might have misunderstood your point and my reply was offtopic,
I assume that GNOME big EGO designer checks the touchspeed setting on his laptop, decides what is best for him and hardcodes it in, in their mind GNOME is usable and if you somehow disagree they will tell you to move on, they will never admit anything, they want to push out all the people that disagree with their vision and keep only the ones on the exact sam page with them on all the possible points.