Is it to cut off the route of transmission or not to get together to protect susceptible people?

Personally, I feel that there are both, because people who don't gather with pathogens can't get in touch with new asymptomatic people, so the route of transmission will be cut off, and those susceptible people will not be exposed in a wide range, which will greatly protect them, but this practice still focuses on blocking the route of transmission so that diseases will not gather and spread, hehe, my humble opinion.