Being a master of napping is not just a matter of being able to sleep for short periods here and there during the day. It is the QUALITY of their napping that is enviable. They go deep. They drop all cares and their bodies and psyches get a complete break.
Interestingly, a cat can go from deep sleep to instantaneous hyper alertness in a nano second. Now that is a trick. For humans, frequently you have the light sleepers that can wake up quickly, and the deep sleepers who have to take their time in surfacing from their sleepy depths.
Some people say they cannot nap, and if they try, they sleep too long and feel worse afterwards. So naps appear not to be an equal opportunity employer. I for one thrive on short bursts of sleep here and there, as needed. I always feel I could leap from tall buildings after 10 - 20 minutes of timing out. It has always been thus for me and, I know we are all different.
I do believe for those that can and do nap, your body and spirit benefit thereby and just that ongoing habit of rejuvenation I suspect adds years to your life. Add to that a strong sense of your purpose (why you are here in the first place) and a feeling of joy that you participate in easily and frequently and, we are all going to live to be as old as Methusla, whoever he was.