So, the actual argument I made was that just because more people were likely to die from drink driving (probability-wise), it didn't mean flying the RC wasn't shockingly irresponsible.

Note that I didn't agree with the claim that this specific flight was irresponsible, just that the fact that more people might die from drink driving is basically irrelevant.

So no, the burden of proof is not on me.

I carefully noted your original argument. That's why I said that the burden of proof should be on you, if you want to prove that the flying was irresponsible.