Redhat isn’t closing their source code – it’s open to customers. And unless you need to use RHEL for some reason, it shouldn’t have any impact. Fedora is upstream from Redhat, not the other way around.
The telemetry Fedora is adding is extremely sensible, and also opt-in. So not sure what the concern is there.
But regardless, that has nothing to do with rolling versus stable releases. There are plenty of other stable distributions not based on Fedora.
I’m not understanding why you’d prefer software that’s more likely to be buggy or broken for your gaming rig over a stable distribution. What’s the motivation?