It turns out that real families matter after all.
One of my children is from a formerly unwanted embryo in a frozen vial. She is now a beautiful human being with the only family she has ever had.
It seemed awfully important to the kids who were tracking down half-siblings, for example. Not "BS" to them.
The perspective is the one from the children's side, not from the adults who have already decided for them that genetics should not matter.
Besides, if genetics didn't matter to people's hearts, "just because", the interest in geneaological research would be a fraction of what it is. People like to find "long lost" cousins, or travel back to the Old World farm where g-g-g grandfather was born, etc.
It's a concept far beyond the circumstances that exist under one roof, or of who raises whom and why.
"Just because" is perhaps the next category of thought crimes. Plenty of folks out there who are keen to decide for others what should or should not matter to them.
Children have been conceived or adopted for all sorts of reasons, none of which are their fault. I wouldn't think to demand how they should ultimately feel about it. For that reason I wouldn't intentionally conceive a child under genetically dubious circumstances, or support an industry that promotes it.
It's way too complicated and potentially damaging on a number of levels. There are enough unfortunate results when people honor the original ideal of Creation (children can be orphaned, for example). Therefore I reason, why start out with and then have to double down in defence of weird sketchy foundations. Something is intuitively "off" about all that.
There's no denigration of those who step up to the plate to give a pre-existing child a loving home, but Big Conception is an abominable industry overall.