To be fair, if it wasn't denatured then it wouldn't just be
someone, somewhere. It would be hoards of underage kids. Heck if I use the self-checkout lane at the supermarket to buy cough medicine the attendant has to come over and approve the purchase because that's abused by underage kids as well.
That said, I won't claim to know precisely where the line should be drawn, but would say that in a sanitizing product shortage during a pandemic the line should be somewhere in the area of "hey how about we make it easier to make more sanitizing products right now"