That is right, but it's still possible to "fix" that.
Will be a painful job, but I think it's possible.
I had the same idea a few days ago...
So I start searching something and found some interesting stuff, like this:
The cursor.tga (32x32), game renders it as 24x24 on 640x480.
So i changed my resolution to 2560x1080, it looks awful.
(2560*24)/640=96px
(1080*24)/480=54px.
The game renders the cursor scaled, so it will be 96x54.
So I made a few changes and corrected the aspect ratio of the cursor, now it is 54x54.
See screenshot attached.
The same idea can be done with the UI, but will take a lot of effort and a good set of images in HD.
I'm not a designer, so... fail
[]'s