I know this feeling - my best friend is kinda similar - she thinks certain things and assumes thats the way it has to be.. she had a cs with her twins ('bc it is the only safe way to have twins') and is booked in for one with her next bubba ('bc you have to have it if you had a cs last time'). I have mentioned this site and also that there are other views and how happy i have been with both my labours/births (even with OB present at both) but she isnt open to other ideas... so I let her go with it, it is what she is happy with and that is the main thing i guess... it isnt easy to bite yor tongue though is it... (i find this with a few things in parenting too, you have to subtly state your POV and then leave them to it i think, bc it is always a personal choice)