[realslimjd]

Because that's even harder.

[tantalor]

I dunno. We can pick up bowling pins pretty easily. Why not chess pieces.

[makoto12]

We are also moving away from traditional bowling pins because the mechanisms are too expensive and hard to maintain, and moving towards pins that are attached to strings, to cheaply reset

[TylerE]

Bowling pinsetters are rather infamously dangerous machines and operate with all kinds of guards to keep meaty appendages out.

[_flux]

For one, chess pieces vary in shape and height.