Is it though? Hosted k8s clusters make deploying a single app just as simple as heroku or elasticbeanstalk, but you still have the flexibility to deploy more. For a small team it's just as easy to setup a managed k8s cluster as it is any other PaaS - you go though a wizard on GKE or some other provider. And if you apps are simple then you don't need to use the complicated features of k8s itself. 1 deployment and 1 LoadBalanced service is simple enough for most Ruby, Python, C#, Java monolith apps to be off to the races.

I'm not trying to argue that it's a silver bullet but there's a bit of circle jerk over k8s complexity when it's not that hard.