People are being very simplistic about this.
There's a lot of 'A baby with GBS? That's the worst thing that could happen and I'll avoid that at all costs.'
But you could argue the same with a lot of other outcomes.
A mother commits suicide or develops psychosis or has serious PTSD? No competition, I want to minimise that risk.
Anaphylaxis? Absolutely not.
Blood clots from an emergency c-section? No thank you.
Thrush infection in my breasts screws up breastfeeding with depression risk factors for mother and loss of immunity for baby?
etc. etc.
Now I'm not trivialising the risk of GBS+ - it has a potentially very serious outcome, but in a normal delivery, the risk of that outcome is very small. Just like the risks of any of those things I've listed above.
But given certain factors, that risk increases rapidly. Just like the risks above.
Now depending on your medical history, your risk for any of these outcomes will vary. But they're all /possible/. And risks have a tendency to spiral. A thrush infection could effect breastfeeding could effect bonding could trigger PND could trigger suicidal feelings. The risk of each step increases with each previous step. Risks have a tendency to spiral. That's why a 'birth experience' is important and not just a luxury.
There /is/ weighing up to do. If I had opted for a hospital birth this time round, I would have needed a C-Section for several reasons. My first birth was an emergency C-Section, I needed a general anaesthetic because the epidural wouldn't take properly. I'm hard to anaesthetise.
There are considerable risks involved in an emCS under ga ranging from the physical risks of surgery to mental illness. PTSD almost ruined my life the first time round. I avoided them with a home birth and would have opted to do that even GBS+ but with a watchful eye on the situation and possibly a change of plan if I'd developed other risk factors (PROM etc.)
Please, please don't insult us by saying 'You're putting a birth experience in front of a baby's health!' - no-one is doing that. But a birth 'experience' can have very, very serious outcomes, mentally and physically which CAN in extreme situations spiral to very unpleasant outcomes including maternal or infant death.
We all want what is best for both our baby and ourselves. I'd die for any of my children. And I did considerable research to manage my risks in all my deliveries.
But that's what it is - it's risk management. Just by getting pregnant, you're risking your life. By putting your baby in a car, you're risking the baby's life. It's a very small risk, but it's there. The key is to manage the risks and to make the very personal decision as to what poses the biggest risks to you and what is most likely to give you the outcomes you want and avoid the outcomes you really don't want. This is why you can't just say 'well, obviously I don't want my baby to die so I'll take antibiotics.' It's /not/ that obvious.
I wish that health professionals could personalise their care to that extent but realistically they can't. There are political reasons that they have to follow the NHS guidelines (why hasn't more research been done into the use of chlorhexidine when initial studies are so promising?) and there are practical reasons - they just can't spend that much time personalising and tailoring care to every individual woman so set general guidelines that suit the average woman.