I agree with most posters. You simply don't know what lies ahead.
I had DD in the days before broadband, and books just did not replicate the plethora of information and advice available at ante natal classes. I found the classes invaluable to the extent that when DD I was in labour there was nothing I didn't understand or anticipate during the entire process. This meant that I didn't feel anxious or scared.
People managed perfectly well for centuries without these services that the government now decide we all must use. It's bollocks.
Yes many but not all of them did, and the infant mortality rate was much higher than it is now. It isn't bollocks at all.
I didn't know anyone else with babies and didn't have a clue about anything either.
The problem with health visitors is that the minority of bad ones give the rest of them a bad name. My HV was brilliant and very supportive. DD had medical issues and I was lucky that my HV had been an intensive care nurse previously and totally understood her problems.
You may be able to find out what you want from the internet, but I am sceptical about how much this replaces a good ante natal class.
And you don't have to interact with the other expectant mums there, I didn't.
I would have given my right arm to be able to go to baby groups, but as DD's health was so fragile I couldn't go, so my first year with her was very isolating as I was practically housebound.
My advice is: don't knock anything until or unless you try it. Your post does come across a bit "I know it all already". And you don't.