It's not going to make a meaningful difference in your threat model and it will cause a lot of hassle for extra configuration and broken docker images, so I wouldn't bother.
There is some nice tooling for transparent user name spaces coming down the pipeline in Kubernetes which will be a nice 0-effort security upgrade, but if you don't have the tooling, I would say it's not worth it.
https://kubernetes.io/docs/concepts/workloads/pods/user-namespaces/