And it was a reproductive strategy that worked wonderfully. We populated the planet. Civilization takes some of the bumps out of the road. Homosexuals can contribute to civilization; Michaelangelo certainly did.
What distinguishes modern homosexuality is how organized it is, so that its members are able to create a parody of the family and to convince a large number of people that the arrangement has some social value.
To what end? I don't think it's a conspiracy.
It was also a very brutal world, one where slavery was accepted as part of the scheme of things, and the Romans kept order by crucifying a thousand men at a time on the cross, and the Athenians lived it up in the gymnasium with their squeezes while their wives lived like drudges, and babies were thrown out like garbage. Civilization of itself, and I think you mean technology, does not make human beings better. The cotton gin certainly did not improve the lives of black slaves. The girls who worked in the textile factories of New England were not better off than they were back on the farm, even though they were materially, no worse off.
To what end? To deny the contribution that Christianity has made to Western society, to deny that Christianity morality improves on nature more than a morality based on self-indulgence. To have the law say that love and lust are one and the same thing.