I think this is always going to be an "unhealthy" debate where each party defends their ground.
I will be totally honest and if it was not for Kennith I would probably be up 12 times a night with 3 bottles and playing co-sleeping.
Kennith "allowed" me to do what ever I thought was best until 6 weeks and then he decided to stand up and set up some rules.
Sleep training was one of them.
With Isabelle, he let me "do it my way" until she was nearly 3 months.
She was breastfeeding practically all night, sleeping in my bed, I was rocking her to sleep and and and .... and I had a fabulous reason why I was doing all of them.
The short story is I went to book club. I came back and she was in her cot, fast asleep.
Initially I was bleeding angry, because "you are not a mom you don't understand what my child needs ''''"
He warned me to leave her alone and let her sleep.
She never slept in our bed again, and albeit for the odd night now and then when she is ill, she sleep in her own bed, and I sleep in mine.
<but other moms might choose co-sleeping, or not sleep training and all the power to them>