The problem is that I cannot comment on the deleted post
That's a shame. I think it would be better if you could - but perhaps that would lead to management problems. Maybe changing this should be a proposal on Meta.SE?
(I mean, not just having the deleter read my comments.)
FYI: By convention, if a moderator's decision is flagged, we leave it to one of the other moderators to evaluate it. There's no visibility to this, so unfortunately you can't be sure we are doing this. (I would rather we followed the aphorism "Not only must Justice be done; it must also be seen to be done.") If we are unsure of a decision, we will also ask other mods to weigh in with their opinion. I try hard not to close ranks without merit in these cases; that's a human bias that needs to be actively fought.
So, one technique would be to flag it for moderator attention.
How to discuss the deletion of my answer?
The ultimate answer to your question is that coming to Meta.Skeptics and posting your concern here is both public and appropriate.
Having looked again at my decision to delete, I think it is defensible in accordance with the community standards, so from my perspective the best outcome is for you to edit your answer to cite to outside experts doing an analysis and flag it for attention, rather than doing your own non-trivial processing of the images, your own psychological and sociological analysis of other drivers, and your own assertions about the physics of water droplets.