This is exactly the kind of issue that the average person might deal with, or it will be a deal breaker and they’ll never try again. Even if you can customize something via a config file, the average user will never do that. If there is no easy GUI in a normal location (like system settings) for something they want to adjust, it might as well not exist.
Average users either will accept all the inconveniences, or none. If it is more inconvenient than what they are used to right off the bat, they will go back and never try again.
And that’s exactly why it will never be the year of the Linux desktop… you know, the claim of this entire post.
Unless Linux appeals to the lowest common denominator, like Windows, it will never become a major replacement.