It’s not like there aren’t soulless-looking one-piece castings.
Multi-part poseable figures get their soul, charm and character once they’re assembled, provided it’s been done with finesse. It’s only a difference of which stage it happens in.
When I open a box of well-designed plastic sprues I see the potential to make something come alive by my own hand, much like how I see the potential to make a tree come alive when I look at a bunch of wire, rubberised horsehair, clump foliage, sand and flock. It’s the thumb-size demiurge in me