Why does minikube cluster goes away from kind cluster gets deleted?

So I first start a minikube cluster (1.25.2) using minikube start. Then I bring up a kind cluster using some kind-Calico-conf.yml file:

$ kind create cluster --name=calico --config=./kind-Calico-conf.yml

When I later delete this Calico开发者_如何学Python cluster (kind delete cluster --name=calico), I can see that the minikube cluster is gone too. Why is this happening?