Exactly. Canonical's Snap Store service is closed source and the Snap client is designed to only interface with Canonical's proprietary service. It's not "disinformation" to point out that Snap is a locked-down product controlled by Canonical, while most other packaging solutions for Linux are fully free and open source on both the client and server side. Canonical's one-sided approach to interacting with the Linux community will only encourage Linux users to reject Ubuntu and adopt distros with more sensible defaults.

And even if they are open source, the development is not (initial development often closed completely, later development requiring CLAs) and the projects only care about Canonical's use of them to the point where even building them on other distros is often far from trivial.