Sure but Red Hat is a US company and Canonical is not, while Mint is basically just a bunch of volinteers. I assume Canonical does not have the same legal vulnerabilities as Red Hat does and certainly doesn't have the same export control and IP restrictions.

At the heart of it though even if Red Hat didn't exist in the Fedora Project anymore, you'd have to convince them to drop one of their top tenants. You could try right now by submitting a proposal to include Nvidia drivers or various codecs or you could just use one of the Fedora Remixes that already do.

Fedora itself doesn't really aim for market share, to sell itself as a commercial product and it's really all about the people that make up the Fedora Project and what they want. Sure Red Hat holds a lot of sway and provide a lot of resources but there hasn't been a fork and major migration either. So in that way some Fedora contributors that and run RPMFusion is a good enough compromise for the Fedora Project as a whole.

Though who is the source of these problems to begin with? I'd say codec/patent owners and Nvidia itself are the source to the problems caused by their unwillingness to support FOSS.

In particular Nvidia has had criticism for years over this and still haven't really changed. Even their drivers aren't great in Linux even if you don't account for the proprietary part. They have the resources and the ability to change everything without hurting their company, yet they do not. You could argue Linux market share is why but Nvidia makes enough profit to barely scratch the bottom line to just support Linux similarly to AMD. They certainly support slicing vGPUs for hypervisors in Linux, provided you pay for the privilege, so it isn't like this is a technical challenge but it is obviously a pure business objective for them. You can and I guess do respect it but that's on you not anyone else.