There are no "Devops people". DevOps was created to mean a world where the DEVelopers are doing OPS, hence there cannot be "Devops people", as it would be a contradiction in terms. If you're specialized, you're just "Ops".

> Real Devops people are competent from physical layer to software layer.

This is usually not the case because DevOps are often people that mostly worked on cloud services and Kubernetes clusters and not real hardware since most companies do not have on premise hardware anymore.

What a naïve take. Real™ DevOps know what they need to know.