To me a sand bunker is a hazard. Shallow sand bunkers are not hazards for the better player, unless that is they are unkempt or largely unmaintained semi-waste areas containing, for example, tufts of grass, heather, bushes, footprints etc.
Now a shallow grass bunker, that's a very different thing, and with a artful humps and hollows, especially with some artful humps and hollows nearby.
All the best.