You're right, for some reason I can't remember any uproar on internet forums when Horn was drafted either
For some reason you completely ignore that rookies picked late in the first round and even in the following rounds can definitely have an immediate impact. There are a ton of examples for it, I mentioned some of them with the Chiefs last year in one of my last posts on the topic.
I agree teams shouldn't rely on that happening though.
While Rodgers' adjusted completion percentage dropped from 47.2% in 2020 to 41.1% in '21 his deep ball accuracy wasn't that much worse in 2021 as it was in '20 as you want to make us believe.