My guess is that normal people, such as the ones least likely to be on Lemmy, don’t do anything when an ad plays. They’re accustomed to seeing them, and aren’t likely to be inclined to stop them, as quite a few on here would. There are always outliers, though.
Sure, do it for your mental health, but it won’t do anything else now. That ship has sailed, been torpedoed, and is now chilling at the bottom of the Mariana Trench.