Nope, I'm not saying anything about sleeping through the night not being safe. Of course I'm not. I'm saying that a baby is a bundle of evolutionary and developmental needs and they are designed to follow a pattern. These patterns are not about whims or manipulations or 'boob addiction', they're about what best and normal for a small baby. If a baby sleeps through of its own volition then they're ready to sleep through. I am not disputing this. I am merely talking about interfering with the developmental needs and norms of a tiny baby. It's not about tackling a wilful behaviour or stopping a toddler scribbling on the wall. It's understanding what normal for a baby and working with it instead of against it or fighting natural, protective behaviours in tiny babies.
And yes a baby might be able to sleep through at 6 months, some do. I don't dispute this. What I was taking issue with was the implication that there are only two reasons whey they might not be. Emotional or behavioural problems apparently. No way they could be hungry? Really? Thirsty? Unsettled? Bad dream? Nappy twisted? Lonely? Cold? Hot? Teething? Babies of the age op is describing don't fit into little boxes and wake for myriad reasons, many of them beyond our control. It's fact, simple scientific fact that babies wake up during major developmental leaps as their brains work slightly differently when mastering skills. Equipping them with confidence and the ability to self settle at an appropriate time is fine. I will never, ever accept that when a baby's only method of communication is crying, that it is somehow right or appropriate to choose when to respond to this. Some babies aren't ready to sleep through at 6 months. Some sleep through younger and then stop sleeping through for a while. All normal.
And yes weaning age was 4-6 months over 9 years ago. But I'm responding to the op's situation now.
I don't dispute that you and other people did cc and their dc are happy and well adjusted and sleep well but these are anecdotes. I can tell you that I've never, ever sleep trained my dc and one slept through at 8 weeks and has done for his whole life, the other didn't sleep through until a lot older. I was happy to follow each dc according to their needs at the time and they are both bright, happy, well adjusted, independent dc who sleep well and self settle. But this is just anecdote, not data.