Yeah, I don't have any particular problem with any particular point he made, except inasmuch as he connects them all to make the overarching point that Russia's selection system is the cause of Russia's success relative to the US team's process, because I think there's good reason to doubt as much. I think that if Russia went to the same wrestle-off system as the US employs, they'd still be the best in the world, top to bottom.
But you're right that it'd be a political minefield if the US went to a system bestowing so much power on a coach or group of coaches. And even if any such person or persons could handle the pressure with bulletproof integrity, scenarios would arise that would put such coaches in 'appearances' conflicts, such as if Koll was the coach or one of the coaches permitted to decide our 65kg rep. You can slip some of that by instituting automatic recusals upon certain scenarios, but such a system would still put certain coaches in bad spots.
I think there'd be a longer-term downside, though, in that we'd get fewer wrestlers out of D1 willing to stick around the sport if their opportunity to make the US team was taken from them and given to a coach or board. Russians wrestlers are fine with that because corruption is so baked into the pie that they don't know what fairness tastes like. But US wrestlers would rebel and/or stop showing up if we let start letting the coaches decide who makes the team.