That's the stupidest reaction that could have been anticipated.
A child deserves a father and a mother.
A child of a one night stand, or a child who is abandoned by her father or a child who is put up for adoption have similar problems.
The need for a father and a mother is a real and legitimate human need and it is immoral for someone to deliberately deprive someone of a whole home.
No one said a child didn't deserve two parents. At least she's wanted by one parent. That's more than many kids have, so yes she does need to grow and get over herself.