Do you wonder why some users at WooCommerce enabled site have access to the top admin bar and WordPress admin dashboard, but some users don’t?
It is by design: WooCommerce plugin developers decided for us for whom they allow access to WordPress admin dashboard and for whom they prohibit it. But thanks them for the professionalism – it is possible to change that default WooCommerce logic via special filters.
Garagulya, V., (2015) Woocommerce Admin Bar Access