"My Workbench" link appears for Anonymous Users

I was under the impression that given the following code snippet (unmodified from Workbench distribution), the "My Workbench" link would not appear if the user was "Anonymous".

workbench.content:
  path: '/admin/workbench'
  defaults:
    _controller: '\Drupal\workbench\Controller\WorkbenchContentController::content'
    _title: 'My Workbench'
    _description: 'My Workbench area'
  requirements:
    _permission: 'access workbench'

As the screenshots show, this is not the case. User is not logged in, regular and mega menu show link, and Anonymous user does not have Workbench permissions.

I'm not sure why, but it could be a misunderstanding on my part.
Please advise. Thanks!