Hi kritur and congratulations on your baby :)
While newborns certainly do "use the breast for comfort" it's possible that your BFC said this because their is such a cultural back-lash against babies being given the breast for comfort as though it's a bad thing, and sometimes people try to not let them suckle if they don't think they're hungry. Actually though it's a sort of sybiotic thing. The baby gets the closeness to you, the comfort of milk, the endorphins released by suckling (very, very strong comfort to a baby). You get the benefit of a baby who has something to comfort her and your breasts are being told to make lots of milk. It's all good and it will not lead to her being over-dependent on you or your breasts, which is what some people do worry about.
Provided that your baby is growing well and you're getting 6-8 wet nappies a day and 3-4 dirty nappies (in 24 hours) then she's getting the milk she needs so expressing to boost supply will take up more of your time for no benefit (unless you want to express for other reasons). Giving formula in a bottle will reduce your supply and potentially open your baby's gut to infection (breastmilk coats the gut lining and protects it from bacteria, viruses and allergens from passing through the baby's intestines which are open, like a tea bag, until 4-6 months). This doesn't mean that you should not do any of these things, just that you need to know the potential risks and benefits.
The behaviour that you describe really is perfectly normal and will absolutely get better - probably faster than you think. If you can get through the first 6-8 weeks most people find that breastfeeding is suddenly a breeze!
Can you look at ways to make the night times easier for you so that you can sleep while she is latched on? Learning to feed lying down would be my top tip and setting your bed up for safe bed sharing can mean you get loads more sleep than trying to settle her into her own bed.
Hope this helps a bit. Oh, and I have to absolutely agree with you on the controlled crying. Human babies are born to scream for their lives if they are separated from their care-giver because otherwise the'd be eaten by tigers. Our babies don't know that there's no tigers in their room and so when they are left to cry they literally are, as far as they understand it, in mortal danger. It's obviously an instinct rather than something they understand, but the terror is real and the cortisol - stress hormone - that floods their brains - is potentially damaging over the long term.
Hope you find things get easier soon. xxx