My take is that a sand bunker hazard isn't supposed to be a "punishment" at all; but even if it is, the "punishment" is the "change of surface." and the fact you can't sole the club in it or within its confines and that brings the vagaries of one's skill and abilities. The sand surface itself is the "punishment"...but I prefer "risk" "chance" "variation."
The "bunker" part is the enclosed or dedicated shape, the real "hazard" is the sand surface and what you can and can't do with it, not a random footprint. By that measure, burrowing animal holes should be played as the ball finds them too.
This other ethos is fine by me, but I'm going to drop that course in my own personal esteem with a comparable one without such a policy.
And the development of the rules pertaining to this, from that original spartan 13 (?) laid out in antiquity, seem to capture what we justly want out of golf, a fair chance to demonstrate whatever ability we have...there's plenty of fortune built into such a game.
cheers
vk