In medicine we already see this where companies continually make new drugs that aren't always much better than the old one, but is 'better enough' that their salespeople convince doctors to use that one instead of the old one that has a generic.
What could we do to ensure that from day 1 this is universally accessible? This is VERY dangerous territory, we are talking about potentially bifurcating the human race here.
I understand if some take a different perspective on the matter.
But the whole debate around genetic engineering is that it isn't marginally better. The fear is that it is so supremely powerful it will dwarf all other interventions.
And I don't think ladder kicking is particularly true. Once education was only for the elite. But we have seen it get more and more popular, to the point it's about as universal as possible now.
Demanding perfection or nothing is perhaps only an ideal approach in scenarios where nothing is, in fact, an acceptable answer. In a world where Tay-Sachs exists, I think that would be an ethically abominable outcome.