When to use Kubernetes Executor

I am running a pretty simple workflow about sentiment analysis of tweets. I am comparing the 3 different executors: local, celery and Kubernetes. I noticed, that Kuberenetes is just really really slow. So why should I use Kubernetes executor? Is it more suitable for high computing workflows or more for simple workflows?

Btw, I have the free trial of Astronomer, so I can’t change the resources.