Right, I;'ve not read this thread, and I ain't coming back to it again. But I've heard it's reputation.
I am one of those mums who knew the guidelines, and introduced solid early for dd (didn't for ds - he was my first). 2/3 weeks early, but early nethertheless.
Why did I do it?
Good question ... I think I felt that I heard contradictory advice about every area of babycare, and at some stage you have to make your own judgements - for example I co-slept, despite being told by health professionals/read the current (at the time) advice that was not the 'safest' thing to do, becuase I believed there were good reasons to do it, and that it was the best thing for me & my baby.
I think I only know ONE person in RL who has waited til the 6 month guidelines (I am on the committee of the local NCT btw, so know people who you would expect to wait...) - in fact, I was made to feel 'odd' for waiting til 6 mths with ds. With both ds & dd I was presurised by health visitors to wean early.
With dd feeding every two hours day & night, I was ready to take the chance that WHO guidelines were just another bit of advice that I could ignore.
In retrospect, yes, I personally hugely wish I'd waited (one of the reasons I don't read these threads - enough guiilt on my own, thanks!) - clearly 2/3 weeks more wasn't going to make a difference, but at the time, it felt like a logical decision.
(From about 6 1/2 mths or so I did blw - dd's decision!)
Does that help anyone understand why this happens?