frequency does help a lot with a customer actually going through with a purchase, but really this is just another way for advertisers to spend more on the same ad spot, because now your competitors can screw you out of multiple opportunities instead of just one
To be fair, it’s sort of the way of the internet and modern western society to love to nitpick and especially nitpick character flaws, and maybe some of that accidentally bleeds into spaces and people that want to be above such things (or at least not in a reductive or destructive way)