In the beginning of my experience, it wasn’t that computers had fonts so much as each computer had A Font, and that was how the computer talked to you. All of them were quite low resolution; blocky and bad.

Now I expect every character to be drawn in an appropriate, smooth, curved, and informatively differentiated typeface.

When did that change start, and when was it complete?

Do you have an X11 application that insists on using a font you hate?

Change that easily with fontconfig.

This syntax in your .fonts.conf will change the response for one font into an answer from another:

<alias>
 <family>Gentium</family>
 <prefer>
  <family>Tex Gyre Pagella</family>
 </prefer>
</alias>

Add as many stanzas as you like; then run fc-cache and restart your application.