Statements like these offer zero value, maybe you could qualify it with some reasoning?

kubeadm alone is maybe 40% of what a production Kubernetes platform is. Just running init and deploying your app is good for a toy project or really small scale cluster.

Every time you hear yourself saying Kubernetes, "only", and "just" on the same sentence, please pause for a moment.

I'm running kubeadm-powered cluster in production for a year and couldn't be happier about it. Absolutely zero issues.

That's not the point. I too have managed kubeadm clusters mostly without issues. The tool is solid.