Yeah, even an established creator is going to have a hard time moving their audience.
If YouTube weren’t a near monopoly it would be different. Then other companies would be competing for creators.
Making it worse is section 1201 of the DMCA. It makes it a crime to circumvent access controls. In the past, Facebook was able to grow by providing tools to interface with MySpace. People didn’t have to abandon their MySpace friends, they could communicate with them through Facebook, and Facebook could ensure that messages sent on its platform arrived to people still on MySpace. But, if you tried that today Facebook has access controls in place that make that a crime. The same applies to YouTube. Nobody can build a seamless “migrate away from YouTube” experience because YouTube will use the DMCA to block them.
The governments of the world need to bring back antitrust with teeth and force interoperability.





Normally that only works if you have DRM that locks the games to your platform, so that people don’t get the hardware at a discount then use it to run someone else’s software.
But, in Valve’s case, it really has no competitors in the PC gaming space. That might not last forever, but it almost certainly will last as long as this PC / console is around.