I have a question, why does 'podman-docker' package conflicts with docker ?

I tried installing both at the same time but faced conflict.

Is the conflict is by design?

I have seen specification of podman-docker in the following link

It says it conflicts with docker, but I want to know the reason for such spec.

I would like to know why 'podman-docker' and 'docker' can't coexist?

It would be really helpful.

Regards