Is seven to ten years considered a long time? No, it's not. Besides, if one started learning it since young, he would be able to earn extra money by drawing and selling various types of Enchanted Talismans by the time he got into university.
Moreover, it was the era of the recuperation of reiki. As long as one could cultivate, it would be a piece of cake for him to reach the end of the Core Formation State, and it would not be a problem for him to live up to a few hundred years old.
On the other hand, it was actually considered a long duration for those from the Dharma Ending Age. After all, they could never break through the Metamorphosis Stage for their whole lives, and their lifespans were no different than that of ordinary people — not to mention the fact that they would get internal injuries from practicing and competing in kendo. In that case, their lifespans were technically shorter than any other human being.
"Do you still want to learn?"
