I'd ask him about those 2nd round picks that busted out. I've already heard his views on the subject going back a ways, that he feels like that is the round where you take a chance on a dude with first-round traits but has flaws to work out. Specifically, if he has had a change of heart on the topic after so many fizzled out. Does he feel that one Gronk offsets Dawson/Klemm/Wheatley and about a dozen more.
Second round picks by Belichick that turned out to be quality NFL players: Matt Light, Deion Branch, Shane Vereen, Jamie Collins, Jimmy Garoppolo.
Jury is still out on Kyle Dugger, Josh Uche, Christian Barmore, and Tyquan Thornton, but maybe BB will hit on all four of those.
If you look at any random draft in the last 20 years, you'll see that maybe 20-25% of the second round players make the ProBowl (and that's a pretty ho-hum honor these days).
In 2010, the year Gronk came out, there were 10 Pro Bowlers, but that's an outlier. More typical are years like 2014 & 2015 (6 PBers each year).
BB and the scouting department aren't perfect, and they're often drafting near the bottom of the round, which means the talent pool is already drained a bit when they're making their second round choice(s). I think they do OK in all the rounds, and are especially good at finding talent in the UDFA arena.
Even in the first round, the odds of hitting on a Pro-Bowler are less than 50%. Many have opined that the draft is a crapshoot, and the numbers bear that out.