Does clearing cache in Kodi Windows affect video streaming or is it just a myth

Hi , noob here, does it really matter if i clear the cache in Kodi Windows ?
I have been arguing with people that it does, but they call be an idiot and call it a myth.
I recently got a “cache is full” message and proceeded to clear my cache and it worked. My HD videos play non stop and when i clear the cache every week it updates my add-ons and my Kodi downloads latest updates.