possibly but they just need to see the video we saw here. he drove on a wide sidewalk around an active cop car. The situation would have been difficult to fully prevent without completely shutting down the street all the way to the buildings. Even then, a heavy EV can obliterate most barricades
There's honestly no reason to not have permanent bollards on the sidewalks. They put them up on all the walks around the capital building to protect legislators. The permanent ones are low maint and much less expensive as they are just posts.
With that a single squad vehicle could very easily block the street and maybe you don't even need those maintenance nightmare ones.