I find that the best senior engineers don't say "if you're not using Kubernetes you're a moron" and "learn how to sysadmin and you'll realize you don't need Kubernetes in the first place", but instead say "Kubernetes is fantastic for this use case because of these reasons..." and "sysadmin would be easier to use than Kubernetes for this problem because of these reasons..."

I'm not sure how one gets software engineers to justify and back up their decisions like this on a regular basis, but I suspect it would help management trust their engineers more.