It is a rhetorical question, but to illustrate a point.
One way to look at it is that the OS is not good because it didn't support the resolution out of the box. Another way to view it is that all it took was a measly 10 minutes of googling to enable features that the OS doesn't natively include. You're right, the macOS probably would have an easier job at handling your monitor's resolution.
Fair point, I have to admit. And I do appreciate that to some degree, but it’s not what most people want out of a desktop environment since they do not have the technical know-how to do it anyway.
One way to look at it is that the OS is not good because it didn't support the resolution out of the box. Another way to view it is that all it took was a measly 10 minutes of googling to enable features that the OS doesn't natively include. You're right, the macOS probably would have an easier job at handling your monitor's resolution.