instavote java worker deployment, service column says " "Yes. No incoming connections"

At https://trainingportal.linuxfoundation.org/learn/course/gitops-continuous-delivery-on-kubernetes-with-flux-lfs269/kubernetes-essentials-for-a-gitops-practitioner/kubernetes-for-gitops?page=9 the service column for the java worker says Yes. No incoming connections while from the use case explained at https://trainingportal.linuxfoundation.org/learn/course/gitops-continuous-delivery-on-kubernetes-with-flux-lfs269/kubernetes-essentials-for-a-gitops-practitioner/kubernetes-for-gitops?page=8 at 4:05 it says Since no other service, or nobody else, even from outside is going to connect to the worker application, this [java worker] application does not need the service.

Is the Yes. No incoming connections a mistake, or am I misunderstanding?