I've never seen any evidence in any form, that cleaning any primer pocket makes any difference whatsoever. I have however experienced annoying issues related to depriming cases BEFORE cleaning them. Not telling anyone what they should do (honestly, I am not even suggesting it, because one's process/methods are very personal and I respect that) but I say this for anyone who might be on the fence.
If you are asking yourself "do I truly need to keep cleaning these primer pockets?" then my experience is an emphatic "hell no!"
I am a big fan of "try it yourself and see for yourself", make two sets of loads in any platform you have the time, energy or curiosity to do, and pit your clean primer pockets against your untouched primer pockets while keeping every other detail exactly the same and see if you can notice even the slightest difference.
I will add just one more thing: PRIDE in your process and your ammo is a very tangible advantage, and I know that it exists. If you enjoy cleaning primer pockets and it gives you pride in your ammo, I am just as certain that yes, you truly should do it. Somewhat similarly, I always use the same headstamps in any box of ammo, even the most simple 9mm fodder for dumping steel plates at 15 yards. Many find it wholly unnecessary, but it has genuine value to me, so three decades in, I continue to do it.