Is it irresponsible to walk away from your child? Rant...

Cheyanne • Had my baby boy, the love of my life 12/16/15
Just curious if I am the only person to think this... Well I made a comment about how the father to my baby is obviously irresponsible and not mature (he is 28 I am 18) since he is leaving his son with no father and someone told me that doesn't mean he isn't mature... Am I wrong...