Interactions with other riders and volunteers/townspeople at controls and along the route of PBP is part of the appeal. If that stuff doesn't appeal to you and you even seem kind of antagonistic to it, then go do another ride by yourself somewhere else. The route of PBP isn't even the most scenic part of France, or Normandy and Brittany for that matter. After 10pm there are no stores open along the route until after sunrise the next morning. All the people and all the riders are there for the event. In 2019 there were over 5,000 riders out of 6,000 slots. For 2023 they're upping it to near 7,500 or even 8,000. So if you don't like brevets and lots of people you won't have a good time.