Apple Pro Display XDR Scaling/Resolution Question

So when you are using a Macbook Pro or iMac or anything with a built in display, and you go to Display Settings, you see scaling options like more space / less space, etc. You can also use a keystroke to see the actual resolutions.. The thing is though, when changing the resolution regardless of which one you use, the image remains perfectly sharp, as if the resolution never actually changed but only the scaling did.

In contrast, when I'm using a monitor with my Macbook Pro, and this has been with every single flat panel I have ever used with a Mac going back as far as flat panels existed, when you change to a non-native resolution using the SAME DISPLAY PREFERENCES the picture is always a tiny bit blurred. I'm guessing because it's really badly upscaling the image or something.

My question is: Does the Pro Display XLR change resolutions or scaling settings WITHOUT blurring the image?

The reason is for the benefit of my eyesight I want to get a monitor where I can set the resolution a bit lower so that I can make the text a bit larger so I don't need my glasses or to strain my eyes to read it. I used to always want the highest resolution but I've since learned that's why my myopia is as bad as it is and even after LASIK has gotten bad again.

But very simply please ignore the paragraph above, just answer my question if possible thx... I'd like to know the answer before spending $6000 on a monitor :)