True. But multicolor is often used for miniatures or alike. Who needs 4 magic creatures? If it's for an Etsy shop, then things are different and your point is a lot more valid.
Usually you'll want to paint miniatures. A multicolor print of a miniature isn't going to look as good.
multi-color is lots of fun! https://github.com/cjdaly/FishCoin
on the X1C multi-color is less bad if you fill the bed with copies since the switch time gets amortized across many parts. So your print takes 13 hours but now you get six copies. Although with a smaller bed on the A1 mini that will help less.