[zenith]

Think of the costs of training.

Let's take an example of where a player trains only 1 stat for a month. Say their stat ratings are :

Accuracy : 1
Dexterity : 15
Resistance : 1
Strength : 1

The costs of going from 15 to 16 in Dexterity are expensive. In fact, if you took the development points you spend to go from 15 to 16 and placed them equally in the other stats, they might all be around a rating of 7 (I didn't check the numbers exactly, just estimating)!