All the same situation would happen with future sight. My point is just that if you assume that future sight has resolved those questions, situation and paradoxes in a beneficial way, because it is a super power, the future smell would be a super power as well, and not a curse...
If future sight has resolved them is a bad way, then it would be a curse, just as any other future sense.
Just imagine always having to see all possible sights three minutes into the future at the same time. There always is a miniscule chance of all air molecules bunching up in the corner of your room or you falling through the floor...
Sure, my argument is that not the modality of the sense matters, but the circumstances of that power. The resolution, the filtering and the agency someone has over that experience.
Smell compared to sight would also cause generally less of a brain overload, since smell is low bandwidth compared to sight. So if future sight as a curse might be worse than future smelling.
Doubling the amount of information you sense just in two moments, now and the most likely future in 3 minutes, might be more bearable with smell.