I think people who say 'the ast majority of vaginal births are straightforward' are as daft as those who scaremonger. The reality is somewhere in between.
I spent a long time looking at the data for birth outcomes (and personally then chose a section, which was v easy).
The likelihood is with a vaginal birth you are almost certain to have some trauma to the area. Severe tears only happen in a few percent, but for a first time mum, about 90% tear to some extent, though some may not need stitching.
You've got about a 50-50 chance of having an unassisted vaginal birth, and then the other 50% is a combination of needing a planned section, and emergency section or instrumental delivery.
It's possible to have a vaginal birth and be absolutely fine (one woman did from my nct), but the likelihood is there will be some recovery, but with painkillers and time, most women are fine.
There's a balance to be stuck between scaring you and giving you the facts. I think some people I know felt let down that they were warned that certain complications 'could' occur, but not how common they were.
In my nct, we had a combination of induction, unassisted birth, ventose, forceps, planned section and emergency section. But by a few months on, everyone seemed recovered, so although things often weren't straightforward, they were all fine in time.