Then you still have one healthy back. You give the ball to your 2nd best RB.
If Diggs/Davis get hurt, it may result in our #6 WR, primary a guy kept around for special teams, getting multiple snaps on the perimeter.
I guess the parallel I’d make would be if at RB, Singletary went down, and it forgave Taiwan jones into a significant role in offense. It isn’t ideal.
Edit: on second thought, I think about it like this:
If Singletary went down on the first play of the game, they could get by in our pass heavy offense with one RB and Taiwan in spells.
If Davis or Diggs went down on the first play of the game, I wouldn’t feel nearly as confident relying on Kumerow to play a major role.