By this comic's definition, I've been an "Alpha Male" this whole time and I didn't even know it (probably because that would require me to be secure in my masculinity and friendships).
In all seriousness, you might be confusing "Alpha Males" with self-proclaimed "Sigma Males." Most alpha males I know are like the best Dads ever who deserve to have children that he raises to be as both strong and caring of the needs of others as he is.