From my research, it can kill babies.
Have you seen this TED talk?
https://www.youtube.com/watch?v=-omq_-WBDlo
In dolphins, the mother's milk kills the firstborn, but once they are purged using their milk & killing their firstborn, they can have babies that survive.
There was no evidence that it was possible to have babies after her thyroid was removed. We were glad to have our 2nd son, but now understand why the first baby we tried to have after radiation didn't make it full term.
I agree with the sentiments expressed in your message, but I do not think it is universally safe given the evidence.