People find good OL in round 7 sometimes too…and sometimes top 10 OL suck…
Yes you can occasionally find a good QB late, and yes there’s a good chance your top 12 QB won’t pan out…but the top 12 QB is going to pan out way more than a 7th round QB.
But the point is, regardless where you draft them, I don’t think there are 32 QBs on the planet that can win a SB, regardless of the OL