I think that's a fair way to look at it. I guess my feeling is that the offense probably has more variable outcomes than in almost any recent season. If Trout and Rendon are healthy and are at least in the universe of their prior performance AND the young guys are healthy and take steps forward, the offense could be quite good. If either Rendon or Trout get hurt for an extended period of time again and/or don't perform up to their standards, then the offense will probably be average. If Trout/Rendon aren't healthy/don't perform AND a couple of the young guys don't hit like we're all hoping they will, the offense could be disastrous.
Yes, you can come up with scenarios like this for other teams--but given the Angels recent history and the uncertainty around the younger guys, I just think the offense is more of a wild card than most teams' offenses are.