Fair, the ones that let you run containers directly like Cloud Run etc are fairly reasonable and approximate the k8s experience.

I think by going non-k8s you miss out on some of the key benefits though like standardized API and more portability of the surrounding infrastructure like networking and storage that is otherwise proprietary or not available on "simplifed" PaaS platforms.

I guess my argument boils down to cost of using managed k8s is low, low enough it's not worth using non-standard services instead.