I think you need to tread very carefully. First baby or not, she's the mother and she should be allowed to make her own choices without being judged because her choices are different to yours or anyone else's.

I say this as the mother of a now 10 month old who, except for literally a handful of nights, hasn't slept for longer than two hours at a time all night, every night since she was 3 months old. I choose to get up to my baby each and every time she wakes. I choose to for the most part let her snuggle in, have a bit of a feed and then just let her stay there until she drops off to sleep when I put her down, all with the realisation that in less than two hours I'll be doing it all over again. I'm totally exhausted mentally, physically and emotionally and I'm finding it extremely difficult to cope with every day life, but what I'm really finding difficult to cope with are all the people who keep on at me about what I should be doing to "fix" my baby. Following Dizzie's rules certainly isn't for me, but that's my decision and I wish my family and friends supported me in it. I think the same goes for your friend, even though we're dealing with our "problem" babies in completely opposite ways.