You are once again arguing from ignorance rather than providing evidence. Let's go back to the article of lizards that may be undergoing transition from egg layers to live births. And you were wrong. It was not just one lizard:
Yes, let's go back to the article and see if I didn't already alert you to the fact that it would require a major change in the organs to move from one type of birth to the other.
"Evolutionary “reversals” to egg-laying are much rarer, probably because
regaining the physiological machinery for producing eggshells would be exceptionally difficult."
Doh.
But let's see what they actually say about whether this evolution is occurring.
"There is a traditional dichotomy in vertebrate reproduction: species either lay eggs or have live births. However, as is often the case in biology, things aren’t as simple as they first appear, and there are a handful of vertebrate animals that
do both.
One of these is the three-toed skink (Saiphos equalis). Our recent research
suggests the egg-laying S. equalis
may currently be in the process of transitioning from egg-laying to giving live birth. [emphasis added]
So, the skink that is already capable of live birth is transitioning to live birth. The article doesn't even make sense. An animal that already has the capability and still does both has both sets of organs. It's not transitioning, it has this capability already.
And their other study does not say that this animal which has both characteristics has has been observed to have evolved but that it is a rare species which is they think is evidence that such a transition might be possible. You're right, the organs won't be different because this species has always had these traits.
"The lizard Saiphos equalis exhibits bimodal reproduction, with some viviparous populations, and other oviparous populations with long egg‐retention, a rare trait where most of embryonic development occurs inside the mother prior to late ovipositioning. We posit that oviparous S. equalis represent an
intermediate form between “true” oviparity and viviparity."
Basically, because you didn't read or understand what I was saying about this, and disagreed that the organs would
have to be different were this evolutionary change in process right now, you just look silly right now. The article you quoted does not say that they observed any change at all and their research establishes that this species of skink has always been this way, though they do suggest that it is an intermediate species.