To limit the probability that the eccentric loading of footings will lead to uneven pressure on soil beneath columns, which could lead to soil settlement and footing and column failure.
This is to limit the probability of:
For floors and elements supporting floors, this to limit the probability of excessive deflection or vibration of floors, which could lead to a loss of balance, tripping or falling, which could lead to harm to persons.
To direct Code users to Section 9.15. which contains requirements for footings.