Can you share your use-case for the ubi-hive image? What problem are you facing?

When creating images to run on top of OpenShift, we follow some guidelines[1] to improve security in the deployments. Explicitly assigning a username is not a good practice because of the random UIDs that can be assigned to the container running on OpenShift, and thus adding an entry in /etc/passwd from an entrypoint script is the solution for processes that need a name assigned to a UID. Due to this, I think your change won't be accepted by the ubi-hive developers. That being said, though we use their image with Trino, they are not part of the ODH community.

Hope that helps.

[1] https://docs.openshift.com/container-platform/4.7/openshift_images/create-images.html#images-create-guide-openshift_create-images