Seems to me that all the parties in the OP story could do to chill a bit.
The TO wasn't wrong to enforce the rule, but ultimately who really cares? I generally don't bother drawing the cards when something goes boom, and nobody has ever brought it up yet.
By the same token if it's really so meaningless to the OP - why not just do it?
It's not hard, draw a card. Boom, done, move on. If someone ever asked me to draw the correct number of damage cards I'd just get the hell on with it, it's a really, really, really minor and stupid thing. I might snicker at the individual who cared enough to enforce such a rule, but it's otherwise no skin off anyones nose.
TL;DR:
Chill. Everyone, just chill. It's a game.