Wut???
It's not the quantity, it's the time spent working with them.
People who work in publications can spend months creating and updating documents. Such reviews go through several people for revisions and approvals. Having a user-friendly font is key.
You may never use it, but others can spend a career in government publications - creating, updating, or searching through them.
I wrote hundreds of work instructions for DOD contractors and font IS a big deal to me. But retired now. My preference is Ariel font.