When you come to think about it, 72 is a much more useful number than 10.
You can divide it easily by 2, 3, 4, 6, 8 and 9, which is why it has been used by typographers for centuries.
10 is really a most unsuitable number. You can only divide it by 2 and 5. It is really only useful because we have 10 fingers and have become used to reckoning on a 10 base.