You're correct, and there are several other scenarios that would produce the same result of NO TAXES OWED.
I agree that requiring tax paperwork when nothing is owed may be a headache for immigration.
Unfortunately, we're still faced with TIT; and there is no telling what may happen down the line to transfer the headache to us by requiring us to go to the local TRD and get a letter saying we don't owe anything. Of course, that would then require us to undergo an "audit of sorts" by TRD to prove/determine whether or not we owe. If that ever happens (and I don't think it will happen) I'll do what I need to do. It's part of just having a plan A, B, C etc. Head on a swivel.