>>41545357
>theres surely something different about it
nta, but can speak a little to this, as I'm in a bunch of queer/trans parents groups. Most LGBT parents (and most single parents by choice) really wanted a kid. They planned for it, they thought it out, they worried about how their lives would affect their children. If you conceive through donor gametes and/or IVF/IUI, it's a ton of money, possibly medications, month after month of waiting and trying, physical stress.
Those barriers and that work basically select for people who strongly care about being good parents, and who are more financially stable. cishet people can be like that too, but they can also have a child completely by accident at the wrong time in their lives for it and with no resources.
This mechanism is why single parents NOT by choice generally have kids that struggle more, and single parents by choice generally have kids that do better than average.