Some great advice - but its unclear here the reason why he's inducing. Its not cool if he's making you feel fearful of a 'big' baby. As already pointed out, its not huge, my third was a 4kg bubba and as a doula I have seen 4kg bubbas being born without any issues (without drugs or forceps/vacuum).

Some doctors will mention shoulder dystocia but its a positional thing and seen in babies of all sizes, even 7lbers.

Good luck and good on you for doing your research. Follow your gut, I find it to be very accurate. And from what you describe about your Ob whizzing things around and not taking time to explain things to you and reassure you, imagine how labour might be for you with someone like that. You'll always remember how you felt during birth, you dont get a second shot - make sure you're happy with your carer and you trust them to do right by you x