It would be horribly inconvenient for the Liberal narrative to admit someone was indeed a unique human being from conception.
To do so, despite the logically incongruous claims of sexual deviancy being hardwired in, would not only have serious repercussions for the abortion industry, but would raise questions of intellectual and behavioural traits being inherent from the moment the unique genetic composition of the individual came together.
That, in itself challenges the notion of 'equality" as expressed in the Liberal philosophy--not the equality of rights, dignity, and human worth, but the equality of outcomes expected to be forced upon those who excel triumphantly and fail horribly, alike.
That that artificially imposed equality of outcome squelches innovation and even cultural development is of no great consequence to those who would use that great leveling to gain and retain the power to be the ones who determine who is deemed merely equal.