dovys parent
You are trying to convince the team they don't need to exist while their livelihood depends on the opposite
This is an issue of comp no? I'd delete my team if it made sense given the chance because we are all share holders as well.
If your company is big enough to have a dedicated k8s team, chances are deleting an entire team won't directly boost your comp.
Better to sell the entire endeavor as change of responsibilities - from a team that manages k8s to one that's responsible for uptime. Set constraints and let the team find the best tool for the job.