I have lived in Santa Barbara now for 40 years and have watched multiple committees and paid employees spend a ridiculous amount of time on something that is a non-problem.
There is no need for people to drive on the closed off section of State Street, as there is ample public parking on Anacapa and Chapala. There is no need for people to ride their bikes in this section. It’s just turned into a playground for adolescents.
In Ventura they go by this rule:
You should walk your bike on the section of Main Street in Ventura that is closed to vehicle traffic. The area, known as "Main Street Moves," is a pedestrian-priority zone, and the riding of bicycles, e-bikes, skateboards, and scooters is prohibited by city ordinance.” I have visited the area many times and it is very peaceful and accessible.