That's a fair complaint, but for the most part that only applies to the faces (which would be an absolute nightmare to hand animate in sync with the voices in a way that felt real) and hair on some characters. The rest of the bodies, and objects in the scenes, are usually entirely hand animated.
To avoid the 3d printing elements would undoubtedly result in a less realistic and immersive movie. Not that you couldn't do it, but I think that's one element that makes these movies work so well.
To avoid the 3d printing elements would undoubtedly result in a less realistic and immersive movie. Not that you couldn't do it, but I think that's one element that makes these movies work so well.