Users expected to change fonts.

The issue description is not clear:
Are "users" administrators or just anonymous site visitors?

Why are users "expected to change fonts"? Do users require a specific font to use Drupal?
Why would a user change a font? What font do they need to change (administrative theme/core/website theme?)?

Also, how would this feature be "enabled" by core?
Many browsers do not support any specific font loading ala #font-face.
Fonts on the web are a relatively complex subject (including fonts, OS compatibility, browser overrides/accessibility, fallbacks).

I'm marking this as "works as designed" as users can currently set fonts by overriding default css/templates with their own fonts, as they would with any web page.

Feel free to reopen the issue if I'm way off base.