"It's sad when the word "selfishness", a virtuous trait, is bastardized to mean the opposite.
Selfishness is serious, rational, principled concern with one's own well-being. This does not disregard the well-being of others. In fact it demands respect of the rights of others as all men have the right to pursue their own well-being."
If you wish to go into some philosophical discussion that the common definition is incorrect go ahead.
One thing is clear you bastardized the accepted common meaning of the word. Not I.