I think you have already seen answer to that in How to get the kernel changes between Rocky Linux 8.8 and 8.10 - #6 by nazunalika
Overall, Red Hat has RHEL major version X that is at point update Y. For example, RHEL 8.9.
Red Hat has paying customers; they sell support subscriptions for RHEL 8.
They did release new point update, Y+1 – RHEL 8.10. An assumption is that most users auto-upgrade 8.9 → 8.10. It would not be good for business to introduce performance degradations, would it? (Workarounds to security issues may cause some degradation, but not on every update.)