Are Public Domain same with 100% Free?

From Wikipedia:

"The public domain consists of all the creative work to which no exclusive intellectual property rights apply. Those rights may have expired,[1] been forfeited,[2] expressly waived, or may be inapplicable.[3]"

I would say a public domain work is even better than free since it more explicitly states that there's no copyright on the work released.

Here's an article I found on public domain and commercial rights.

https://askwonder.com/research/commercial-rights-license-sell-artwork-public-domain-z9x6wfrzk