Ignoring the course management aspects and associated skills of the architect for the moment then small, deep, high vertical face sand bunkers with steep sides and rear lips are pretty significant as a shot is also a function of the stance, swing path etc. Proper hazards, obstacles best avoided, places to keep away from or suffer accordingly.
If of the wider, flat and shallow sided variety, well is there much point in having them apart from eye candy and nice photographs?
And then there’s maintenance and upkeep time and associated ongoing and renovation/restoration costs, which are usually rather significant.
Atb