He was motivated by something other than selflessness.
Here again we see the distinction between the concept of altruism as it is commonly used in modern vernacular and as a technical term in the study of ethics and philosophy. Many of the examples that have been offered by others in this discussion describe the former interpretation, liberated from the necessity of proving the absence of self-interest.
In fact, it seems to me, there is nearly a consensus among us that altruism generally
does include some degree of self-interest. The odd man out being you, iss. Which explains very neatly how the rest of us can celebrate our altruism and the altruism of others, whilst you doggedly insist that it doesn't exist.