[Tuor of Gondolin]

Yes. But the idea is to keep things stirred up.
Since even in conventional (non-ring possession)
terms Sauron is the strongest force (with his
allies) the best of poor alternatives might well be
to foster dissension in his forces which would also
tend to keep some good guys in play in Middle-earth.
Recall even Gorbag and Shagrat (while in the employ
of the Dark Tower leading their lads
in fighting to the death). And the orc (I forget his
name) trying to get the ring from Merry and Pippin.

While such a strategy of delay fortunately didn't work
for Hitler it proved quite successful for Frederick the
Great.