While there's certinly something in what you say, most lesbian couples are highly disfunctional compared to hetero couples. Domestic violence is greater, as is the incidence of other mental problems. Like lying to get the kid.
The only lesbian couple with a kid that I had extended contact with could in no way be decribed as normal. The biological mother was relatively normal, if a little smug. The butch was more macho than any three guys I know, always punching you on the arm, talking about how tough she was and how much she could press, etc. The poor little girl was sullen, silent and almost invisible.
I think giving a child to a lesbian couple is a very poor choice, in general. Especially a male child.
Compared to leaving him in China?