A little history may be helpful here. The "General" preference pane has existed since Macs first began, way back when... and what you would find there, way back in the mid to late 80s, was things like Appearance, Cursor blink rate and so on.
Keeping things like this under "General" isn't jarring, it is continuity. If you are a long time Mac user, you KNOW where this stuff will be, and you EXPECT it to be there... and it is a comfort and a joy when it is. When it isn't (read "today's preferences") THAT is jarring, to a Mac user at least.
If you started out with Apple products on an iPhone, you may reasonable wish that all Apple products had GUIs that looked like the iPhone GUI. However, if are a long time Mac user, you will reasonably want your new Mac's GUI to look like ... a Mac GUI!
Macs and iPhones are different devices and are used for different things. It is more than OK if they have different GUIs. The IOS'ification of macOS will be the death of it, or at least the cause of many, many Mac users refusing to "upgrade" - really, a usually downgrade!