Which really just goes to show that the "legible" aspects matter far less than the illegible aspects. It's easy to say "hey, this startup is using boring technology and deploying a monolith, great!" or "Kubernetes and a bunch of services, over-complicated!". It's hard to say "hey, this startup's codebase is awful and it's an unforced error slowing them down" vs "hey, these guys are taking some shortcuts but it makes sense in context".
But a mess built on "boring", simple tech is going to derail you far more than a needlessly complex but well-executed setup.
The point being, Kubernetes is easily the right choice for a start-up if you have a Kubernetes expert on the team (and the rest of the team is willing to put the time in learning the system and not just cargo-culting around it)