This line of debate - how and whether the 13k default works to achieve its goal - has a separate thread.
It would be unfortunate to derail this disussion about the timeout rule with that discussion about a different rule.
Suffice to say that there are arguments presented in that thread, and if you ‘don’t understand it at all’, you’d best read those in that thread and see if it helps.
The point here is that both that rule, and this one, are based in a premise about the maths of keeping the rank pool stable. They are not contradictory, as asserted.