I read through the CDC guidelines for vaccinated people, and they actually did differentiate between non-vaccinated lower risk people and non-vaccinated higher risk people. They are advising vaccinated people to still mask up when visiting non-vaccinated higher risk people, which makes sense given their conservative approach to things.
Fully vaccinated people can:
Visit with other fully vaccinated people indoors without wearing masks or physical distancing
Visit with unvaccinated people from a single household who are at low risk for severe COVID-19 disease indoors without wearing masks or physical distancing
Refrain from quarantine and testing following a known exposure if asymptomatic
For now, fully vaccinated people should continue to:
Take precautions in public like wearing a well-fitted mask and physical distancing
Wear masks, practice physical distancing, and adhere to other prevention measures when visiting with unvaccinated people who are at increased risk for severe COVID-19 disease or who have an unvaccinated household member who is at increased risk for severe COVID-19 disease
https://www.cdc.gov/coronavirus/2019-ncov/vaccines/fully-vaccinated-guidance.html