I was kidding because it was never explained why the women on the Island couldn't give birth and it never explained what the Others did with the kids the kidnapped.
It seemed some such a major story line in earlier seasons. The reason Juliet was on the Island, medical experiments, kidnapping Walt, kidnapping the kids from the beach.
For some reason the secret cave of light must not have like kids.
They kidnapped the kids and a small number of other survivors because The Others are the good guys.
Imagine you are The Others, servants of Jacob, the protector of the island. Jacob has candidates coming to the island who must be tested through many tribulations so they will be narrowed down to one ultimate replacement. However, inevitably when there are shipwrecked survivors, there are also innocent children and other innocent "civilians" among them.
You want to rescue those innocent civilians and children. But, you know if you walk into that beach camp and announce that "we will take Zach and Emma and that stewardess back to our Temple, and the rest of you are staying here," all hell will break loose. So, what do you do? You use your elite jungle-fighter commando members to go over there at night and "kidnap" these innocent civilians. You risk your life in order to save these few people. Some of you even die in the attempt to save them.
And then you take them to the Temple, where they can live out the coming years in a beautiful paradise, in relative safety and comfort. Did Zach, Emma or stewardess Cindy look like oppressed prisoners? No, they were happy and relatively content. The kids wondered if they'd ever see their parents again. But Cindy was even smiling and happy there. Because they had been
rescued. No fear of rampaging boars, crazy jungle women or especially the Smoke Monster.
What Ethan did with Claire and Charlie was not authorized. He went a bit rogue, and it cost him his life. But frankly, the survivors killed more of The Others than vice versa, despite the fact that many of The Others were elite killing machines who could come and go in the jungle as they pleased, even without leaving a trace or a trail. In some cases, the Losties even killed an Other who was clearly unarmed (Sun killing Colleen, Sawyer killing a surrendered Tom after Tom had defied Ben's orders and spared their lives). And did The Others respond by wiping out the Losties? No. It continued to ultimately work toward their long-term well-being in service to Jacob. And yes, when pregnant women appeared on the island, they saw this as an opportunity to try to solve the lethal malady that kills all pregnant women on the island. I don't approve of all of their methods in this area, but it was still a noble pursuit to desperately try to save lives.
Ben told the truth. They were always the good guys. Not perfect, and I don't condone
everything they ever did. But, yes, they were the good guys!