It's just unfortunate that Trump, and now, excessive pardons are politically polarized, which could cloud the fact that justice was done today. I don't credit Trump in any way for doing "the right thing" or even having a principled position regarding Ross' case. Clearly, others with influence on Trump convinced him to sign it. It doesn't matter how the pardon happened. Biden should have already pardoned Ross because that crazy sentence shouldn't have happened in the first place.
The hypothetical is there to try to tease out a principled stance from our intuition. If someone stole a wallet that contained $1B, should their punishment be a million times harsher than someone who stole a wallet with $1000? Should it be 5x harsher? The same punishment?
If your stance is that luck would not ideally affect one's punishment then the amount stolen isn't itself a factor in determining the punishment. It's downstream of the true factors, such as the number of thefts committed. The amount stolen is correlated but not causal.