9.5 week pup: no public areas, no socialization until 12 week parvo booster vax?

Raised 4 pups/dogs in my life, none of them under 4-5 months old so this is new to me.

Don't walk the pup, don't go to any park, keep it from other dogs until it has had it's parvo 12 week booster? Vet appointment in 2.5 weeks for 3rd vax fwiw.

Surprised consensus seems isolate from parvovirus risk is more important than early socialization.

Is my googling research weak or is keeping pup away from public until 12 weeks the way?