It's not like the code to change menu fonts should be that daunting a task to add nor actually cost anything to implement ... it's apparently a matter of style being valued over utility.
It's actually a heck of a lot of work. Microsoft decided to create Windows 95 and later as a resolution independent desktop.
For whatever reason, Apple has never given users the option to choose any font they want for the GUI.
Unlike Windows, the Mac OS is not an active desktop. Or as some techs call it, resolution independent. When you change a system font, everything needs to make room for your changes. Meaning every single application dialogue item needs to expand, shrink, or move as necessary so the font, and font size you chose doesn't cause text to overrun the space it's supposed to fit in. The Mac OS doesn't do this, so the fonts are chosen by Apple and coded to fit a fixed space.
If you were allowed to change the system font appearance, but nothing was coded to make room for it, you would get results like this:
Normal:
Same app with a change to the system font used for the menus to Times Regular at a larger size, but in a non resolution independent app:
I didn't change everything, just enough to show the idea. But this is what would happen everywhere on the system if you could choose any font and font size you wanted, but nothing could adjust for space.
As for the Accessibility Pane, that was the second place I looked ... nothing there to simply increase the system menu font size.
Nope, there's never been anything there for that function. As stated in this topic, the only way to adjust Apple's menu is to adjust the entire screen resolution.
