I will never understand why laypeople always assume professionals are morons who never think of things. Particularly bizarre when this mindset comes from military folks who have spent a lifetime receiving the same crap from the average Wikipedia civvy expert.
Aside from the fact that the freight railways have no interest in any of this, your suggestion takes every controversy about HSR and scales it up 10x. Take Alto's 60m RoW (which already has sensitivities with the rural public) and now make it 100m to accomodate extra track. And then tell the neighbours you're doing this not just for passengers (who they are already convinced look like the monopoly man) but to move hazardous goods too. I'm sure they'll love it. Oh and all this to end up with another set of freight conflicts that this very project is trying to avoid.