They make it into a hobby that's worth their time. A friend of mine spends his down time being a costumed re-enactor in a roman legion as a scribe.

He makes his own papyrus, his own ink, his own period accurate tools for doing all of that and he writes the re-enactment group's documents with a feather.

For a quick and sloppy job that looks like museum quality calligraphy to me, he spends 8 hours on a single page. For display work, he can spend days just penning one or two pages.

It's just worth the time investment to him.