This is very true, I tried to print some figurines using filament, and it was a total disaster. I'm sure there are some figures and some settings of slicer and printer that work, but just grabbing a fig and printing it isn't the same as grabbing other things and printing them. My experience based on 5-7 spools of filament printed through a rather enhanced Ender 3 Pro (+BLTouch, MicroSwiss, new mobo, dual gear extruder, upgraded bed springs).

Though, as others here mentioned, resin may not be what you want either. I looked at them briefly when my son was interested in painting minifigs, and decided I didn't want to deal with resin and I DEFINITELY didn't want him working in resin, based on the messes he makes with cereal.

You can get reasonable results printing minifigs with a FDM printer ... tiny nozzles (0.1 mm), tiny layer heights (0.05 mm) and very slow print speeds (<10 mm/s) will get you a long way ... but even then resin printers just blow the results out of the water easily.

Resin is really nasty stuff though. Many folks may not want to deal with having it in the home and disposing of it.

I’ve spent more time mastering my resin disposal process than printing with my resin printer. From settling, exposing and filtering my isopropyl alcohol so I don’t waste tons of money on rinsing my prints, to how to handle all the partially cured resin and avoid contamination (was really surprised to discover the sorts of things that will soak up some resin chemicals and get. Discoloured)

It depends on the scale. I'd imaging GI Joe/Barbie scale you want FDM. Minis for D&D you want resin.

Not to mention, way cooler to watch while printing.

and you can add glitter!