In your Setup > Access Levels, you can give View access to Workers (and nothing more), but they'll still only be able to find Workload Balancer within a project itself. Keep in mind that you have to make Workload Balancer visible in their layout configurations for the Project menu. There is no way to show Workload Balancer in the Resourcing area for a Worker.
Our workaround was to promote Workers to Planner. Most of these users have zero interest in getting nosey with the Planner functions. Plus, I've adjusted their layouts to limit visibility to some of the Planner tools, which prevents them from doing Planner things in their Worker world.