I think it really depends on where you live as to what your experience 'in real life' will be with regards to people thinking you're weird for breastfeeding or formula feeding. Where I'm from, I'm very nervous about reactions to breastfeeding - it's kind of expected that you'll formula feed so that you can get your life back, so to speak. While it's something I've never agreed with, so therefore haven't taken part in unless I have specifically been asked to do it, the amount of people who think that visiting a new mum means you get a turn at feeding the baby. My 16 year old SIL has already offered to babysit LO when he's a couple of days old so that me and OH can go out - while it's sweet that she offered to do this, it's something that she has offered to do because she's used to a culture where babies of any age can be dropped off with whoever and not need to have their mum there to feed them. If my friends have offered similarly, I've been made to feel bad for 'hogging the baby' when he shows up. It just isn't normal here for babies to be breastfed, or being so reliant on one specific person. This is why it's so important that breastfeeding is promoted here, and formula isn't.
I've been asked 3 times how I'm planning on feeding LO, as soon as I say "I'm wanting to breastfeed" not a single word more is said about it. I've had one leaflet and a DVD which shows the basic mechanics behind it. Everything else I know about breastfeeding I've had to go out and find out by myself, mostly online and largely from BnB!
The NHS Ready Steady Baby pack I got at my booking in has 2 pages on BF and 2 on FF - and beyond knowing the basic safety rules behind formula feeding there really isn't much more that can go wrong that a generalised advice leaflet can help with. A leaflet isn't going to know what bottles or teats will work best for your baby, nor will it know if any given formula will not be compatible with your own specific baby. If a formula isn't compatible it is, at that point, a medical issue and your GP or HV will advise you best if it seems like your baby will need a specialised formula for reflux, lactose intolerance etc. With BF a bad latch or other such issues often aren't a medical issue that a GP should be helping with but one that community support would be best suited to helping with. The vast majority of anecdotal evidence that I've seen online since researching my own choice tells of GPs and HVs recommend switching to formula rather than finding a way to work through an issue.
At the end of the day, I personally will never judge a mum for how she chooses to feed her baby. While I hope myself to successfully breastfeed for at least 6 months, if it doesn't work out and I know I've given it my best shot, I see no reason for me to feel guilty.