On one hand, yanbu. It IS overboard...BUT....
9lb is big, but apparently 9lb 15oz is the macrosomic barrier. My first baby was 9/15, one stitch, have been called bucket ever since. I'm 5'2" tall, and was 7 stone 10 lbs when I got pregnant with her.
Since then, I've been monitored closely with all my pregnancies, checked for gestational diabetes (nope), poked, prodded, scanned to within an inch of my life. Sophisticated scans at 8 months told the consultant that baby 2 was going to be "at least 9 1/2 lbs", midwife felt my tummy and said "nonsense, 7lb 6oz if that". She was correct. Bang on, in fact. but I still had 12 stitches due to baby having FreddyKrugerlikes nails. Baby 3 was 8lb 7oz, and baby 4 I was monitored like a lab rat, due to my age, split pelvis nonsense, previous fat baby etc. Turned out he was large (9lb 8oz), I was polyhydramneous, etc, and ended up having an emergency c-section due to a failed induction.
Now, I know this was classic NHS arse-covering - I remember a more sensible consultant saying "Oh just break her waters for goodness sake" "Oh no, we can't, the polyhydramneous might cause a prolapse" "yes but that's a tiny percentage and could avoid surgery" (bear in mind I was out of my mind with 3 nights of excruciating pain and gas&air when I heard this, but the gist is there)
The thing is...you know, and I know, that it's all over-reactional bollocks. But there is that one percent. A tiny risk, yes, and the resulting faffing about is a pain in the arse. Or even in the ladygarden. I very probably DID have unnecessary surgery - after all, I'd squished out a fattier boom boom before that, hey presto (Though I think I might have said something other than that at the time...)
But just suppose. Just suppose their doomsaying HAD come to pass, for want of extra faffage? I know of too many people who weren't monitored when they should have been. They really should have been. And they weren't :(