It’s literally OCI compatible, integrates with systemd and LSM, and runs rootless by default. Podman is 100000% better designed on the inside with the same interface on the outside.
Rootless networking is still a mess with no IP source propagation and much slower performance.
So for most users docker with userNS-remapping is actually a better choice.
Also systemd integration isn't a plus for me, I don't want to deal with SystemD just to have a container start on startup.