The point to precise time keeping is not as freakish as some might think. It requires considerable discipline of thought / activity direction and is a very useful tool help an individual learn how to manipulate variables constantly.
I think going down to the second level is a bit ambitious for most people and perceive that using the decimal division of time to be an advantage in aviation matters for a number of valid reasons, speed of calculation being one. But I also like the method because it causes confusion amongst some people and indicates their level of current understanding.
Till later, I have to be at the bank by 13.2
Best Wishes