Kind of along the lines of what Gonso is saying, this LOLPFF article with the clickbait title made some sense of it for me. I don't know about all their probability estimates, but the general concept seems sound. Cliffs are you shouldn't look at QB as a binary have/don't have situation and want to maximize your odds of having an elite QB. They estimate having both QBs significantly increases the odds of having a top 6 QB. Elite QB play yields 1-3 wins above average where other positions are like 0.2-0.7. The 50th percentile of non-QBs at pick 53 is slightly below average starter and the 70th percentile is a slightly above average starter. Eagles obviously think Hurts has elite potential, so from an EV standpoint it makes sense. FWIW PFF had Hurts as #2 (Burrow #1) in their college-to-pro QB projections.
https://www.pff.com/news/draft-jalen...s-a-great-one*
Those 30% odds of second round picks becoming slightly above average or better also makes me think I shouldn't get too worked up about individual picks unless past the first round, but get concerned if they're always whiffing.