I think the best solution is to have a... Link? To the general setting.
Having duplicated settings across multiple settings page is something that I think is an issue. Cause it isn't obvious to the user if the setting is actually shared between the two pages or if it has two different options with the same name. It also doubles cognitive load to the user, as if they have a Touchpad and Mouse they need to remember both pages have the same setting.
A link is more of a way for the designers to tell the user "Hey, we know what you are trying to find, but it is in another place"
The issue is the perpetual ownership.
If I lend you money, you only own me the money I've lended+interest. I'm not going to have a stake on your future businesses, nor have any decision power over you, it isn't in my power to make sure you squeeze the most money possible over your job. You pay the money back and we are done.