Rant & I'll probably get some stick for this!

Nearly everyday I look around & see people who have kids who shouldn't.. A mother who leaves her beautiful baby boy at every opportunity to go out drinking or away for the weekend... People who don't even know the basics of baby making and are trying for a baby.. Makes me so annoyed and I know it's not Christian of me to judge but I just think why not me?! Why not my friend who has wanted a baby for years.. People who really want children & who would love them so much. Life is unfair. 
Edit: thank you for most of your kind comments. You are right, I should just think about me & I do try but sometimes it's hard. The mother I'm on about is a family member so I know all too well what she's like. Thank you for the different thoughts/ opinions.