I'm still surprised at the ignorance of some HCPs, even very newly qualified ones. DS became poorly after birth and was admitted to NICU, he was 3 days old and we'd made a good start bf, although my milk was only just starting to come in. NICU sister said he was only comfort sucking and needed formula 
Also more recently, a trainee HV said that 14 month DS was only 'comfort feeding' and that my milk wasn't of adequate nutritional value. If he wasn't getting breast milk he'd need cow's milk, so I just don't understand the logic of that.
In my own highly scientific study
I was on a busy post-natal ward for 7 days after the birth of DS. 8 bed ward, I think I saw about 30 mums come in over that time. I was struck by just how many new mothers wanted to breast feed, but the lack of breastfeeding support (especially overnight) meant that many mothers, by the morning, asked for formula.
It's so tough after birth, struggling with lack of sleep, pain, roller coasting emotions and the weight of responsibility. And dad gets sent home overnight, staffing is down to a bare minimum. And we know how crucial those first hours are to establish breastfeeding. Saddest was the women who'd had c-sections, who couldn't physically get to their crying babies.
(I wasn't being nosy honest, small ward, sister didn't allow curtains during the day and anyway you can hear everything that goes on, even with them closed)