What they actually did was decide to spend their time working on what they want to work.
Anybody else that wants to spend their personal time on Gnome 2 they are free to do so. And it looks like a few people did, like with the MATE desktop.
You can fault them for a few things they did.. But they didn't for anybody to do anything. It's impossible for them to do that even if they wanted too. Only could do this if they kept their software closed source and depended on the violence of the government to enforce licensing requirements, like some other people are wont to do.
Inflated sense of entitlement seem to distort the perspective of many people. This is not something that is unusual for human beings.