When I was young I gave very little thought to the issues of biological vs (not) relations, and if I thought about it at all, thought vaguely how nice people were to help childless couples have children.
Time passes though.
My perspective got wider. I saw friends, so many friends, searching for years for the absent biological mothers and fathers, the people who might or might not be nice, who might or might not want to know them, but who would be as like them genetically as anyone could be short of a twin. Where did I come from? The blanks in the family tree.
I've seen the distress when the parents don't want to know. Or they do, but, the relationship will never be the same as the kids they had and kept and raised.
I saw stepkids and adopted kids growing up as cuckoos in the nest, loved, but not really understood.
I saw friends looking back and realising why the person they thought was a parent treated them so differently, never seemed to like them.
And nowadays I find it hard to see how gamete donation can be reconciled with the principle of putting the child's interest first at all times.
Do I think I know everything? No. Do I campaign against surrogacy, or say anything to people using donor gametes, or otherwise stick my beak in, again no. I'm just one person with a view, that changed. Genes matter.