I think the silent/invisible nature of cookie sync'ing is what upsets people when they discover it. T he diagrams in your link show a single hop for the 302,

I think the silent/invisible nature of cookie sync'ing is what upsets people when they discover it. T he diagrams in your link show a single hop for the 302, in my experience that can be many hops going between different advertisers. The same thing happens on non-google platforms, like TradeDesk and others. The sync scenario can make it next to impossible to delete cookies when those cookies can be rebuilt using data from others.