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.
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.