> I kinda thought the whole idea behind open source is that no one company or group of companies/licensees gets privileged access to or control over the software, including any company that happens to have the same name as the piece of software.

That is not, at all, the idea behind open source. The idea behind open source is, basically, 'you are free to do whatever you like with the source code, as long as you credit us for our work and don't hold us responsible for any effects of using the work'. That's it. There is nothing about companies, corporations, licensees, who has control, who has what name, etc. All of that is irrelevant to open source at its core.

It's true that many people add on an open governance model (e.g. Rust) and mistakenly think that that is part of open source. It's not though.