In essence, whatever is at #6 or #10 at your priority list is not something that's somewhat important and should be tackled from time to time - it's the very thing that's stealing your time and attention away from your #1 and #2 things, a dangerous distraction that you should consciously limit and either avoid or schedule to a specific time.
You don't have to worry about priority #1001 taking your time - you don't want to do it and so you won't; but things that are seemingly good often lead to "yak-shaving" at the cost of what's truly important for you.
In essence, whatever is at #6 or #10 at your priority list is not something that's somewhat important and should be tackled from time to time - it's the very thing that's stealing your time and attention away from your #1 and #2 things, a dangerous distraction that you should consciously limit and either avoid or schedule to a specific time.
You don't have to worry about priority #1001 taking your time - you don't want to do it and so you won't; but things that are seemingly good often lead to "yak-shaving" at the cost of what's truly important for you.