Yeah, of course running random docker compose files and containers from the internet and blissfully exposing your mongodb or whatnot service unsecured to the whole world seems like an easy, non-complicated alternative. Kubernetes has a few shitty defaults, like exposing a service account for all pods by default or allowing to mutate pod image tags, but most of the functionality it provides is a must have when you actually care about your SLA. Rolling updates with health check and configured back-off time? Separate ingress for OAM and live traffic with automatic HTTPS, etc? I could go on.