Shrinking, you said, "I find it distasteful that people tell me my children will have poor relationships, and will have attachment problems as a result of being ignored, or left to cry because I have followed GF."
No one has said that to you here - what has been pointed out on this thread is that schedules and clocks and rigid adherence to routines is not consistent with responsive, flexible parenting.
GF certainly does not approve of people adapting her strategies or 'picking and mixing' from them....of course, in the real world, this is what many people do with books, and so despite the books, they end up being responsive, attached (in the technical sense) parents with contented children. It's odd that the book and the author take the credit for the happy results of these parents' own sensible, loving and flexible child-raising.
"I can't imagine anyone follows it literally WORD for WORD." I can tell you this is what some people try to do, and as a breastfeeding counsellor I hear from many tearful, exhausted and demoralised parents who are failing to follow whatever routine they have read about/heard about.
"BUT are you saying it is BAD advice to suggest to new mums that they drink lots of water, and make sure they eat regularly when they are breast feeding?"
I think it's bad advice to tell mothers they 'must' do this in order for breastfeeding to succeed. It's incorrect and misleading. Mothers only need to drink to thirst, for their own comfort.
"Sometimes new mums need reminding to check nappy's if a baby wakes from sleep" - I agree, reminders might be helpful for all sorts of things. I don't object to reminders. I object to rigid instructions on anything beyond safety issues.