Bertrand Russell wrote more than 70 books, more than 2,000 articles, and more than 30,000 letters of substance, including many scholarly works in areas of logic, epistemology, and the philosophy of mathematics, and was a tireless spokesman for humanitarian rights. He won the Nobel Prize for that. So perhaps his notion of "wasting time" is different from yours.
I spend an hour each day doing nothing but listening to music. It is purely and solely for personal enjoyment. I could be doing work during that time, but I do not. It is "wasted" time in that regard. However, because I enjoy wasting that time listening to music, it is not wasted time.