These components are very different in complexity and scope. Let's be real: a seasoned developer is mostly familiar with load balancers and ingress controllers, so this will be mostly about naming and context.
I agree though once you learn about k8s it becomes less mysterious but that also means the author hasn't pushed it to the limits.
Outages in the control plane could be pretty nasty and it is easy to have them by creating an illusion everything is kind of free in k8s.
A really simple setup for many smaller organisations wouldn't have a load balancer at all.
No load balancer means... entering one node only? Doing DNS RR over all the nodes?
If you don't have a load balancer in front, why are you even using Kubernetes? Deploy a single VM and call it a day!
I mean, in my homelab I do have Kubernetes and no LB in front, but it's a homelab for fun and learn K8s internals. But in a professional environment...
No code at all even - just use excel
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