It's nice someone is looking at Kubernetes critically.
"Taubyte eliminates the need for DevOps and platform engineering"
Every developer? No, developers that can't keep it simple.
One of the reason Kubernetes became mainstream is developers pushed adoption to get higher paying jobs.
Of course it's managers as well, in an age in which most engineering managers have limited technical knowledge (i.e. wouldn't pass their own engineering interview).
Engineers have lost the ability to keep things simple, to make technical assessments in an objective manner and push back on management.
For most apps that assessment would be: we can put it on a VPS.
It was the same with cryptocurrencies and driverless cars.