Since Catholic and Evangelical agencies make up a hefty percent of successful adoption agencies nationwide, loss of these agencies would result in a disastrous shortfall of adoption opportunities for kids who need a mom and a dad.
Besides, I fear that if agencies are legally forced to offer babies to homosexual couples, you're going to have a hard time persuading girls with problem pregnancies to give birth and agree to their babies' adoption. Instead of facing the possibility that they'll be placed with a gay couple, they'll abort them instead. That's what I fear.
A young girl was just 4 months from giving birth to a mix raced child conceived as a result of a one night stand. They got the call because it was a weekend or holiday or something and none of the bigger agencies she called answered their phone. The girl's only condition on the adoptive family was that the father be involved in the baby's life. My sis and BIL had been on the adoptive list for so long that, of course, they jumped at the opportunity. The agency asked the girl what her next step was going to be if they hadn't found a suitable family and she said abortion.
She knew in her heart that it was wrong but was in a desperate situation due to one night's bad judgement. Plus, of course, the first place she'd turned to gave her that recommendation. As the small agency told my sis, we can't tell you who it was, but there are two Ps in its name.