There are many players involved and each has a different appetite for risk and access to different controls for the risk encountered.
Suppose for example, you're an automobile manufacturer. Then the success of campaigns to eliminate automobiles is a risk to your business. To control that risk, you may support politicians who advocate for your interest. (IE the Ford gov in Ontario CA, there is a large base of auto mfgs in Ontario)
On the other hand, you might be a person who needs to get to the other side of the street. In this scenario, if your appetite for risk is large enough you can don PPE and attempt a crossing or eliminate the risk completely and not cross at all.
Supporting local advocacy groups is most effective in areas where there aren't embedded interests like the Ontario example. In fact, most cities/regions don't have an embedded automobile manufacturing or related base and would be well-suited to grass roots advocacy.