The point is that the player on the field was widely known to be incapable of making the play.
The last few games, Nakamura has only been in the game on running downs, because it finally became obvious to Rivera that he sucks in pass coverage.
it should have been obvious to him from week 3 like it was to everyone else. Rivera had the better player sitting on the bench.
this coaching staff has a problem of not fitting what they do to the personnel on the field or putting the personnel on the field that fit what they want to do.
yes....it's nakamura's fault for not making the play, but it's the coaching staff's fault for having him on the field in the first place considering what they were wanting their safety to do.
he was the wrong guy to have on the field in a passing down. that's on rivera.
not all players are capable of doing the same things on the field. should they all be capable of doing the same things? sure. but they aren't and that's just a fact of life. not every person or player is built the same way nor are they all capable of doing the same things. rivera and his coaching staff should know what nakamura is capable of and he should know who is the best FS to have on the field in a passing situation like that. they chose poorly.