I agree with the policy but this is such a mild offense. Just a few years ago in the US there was an epidemic of drunk people savagely beating flight attendants.

People who cannot figure out how to share use of shared space should lose access to those places.

Yes and no. I don't want to be a Karen, but also I think it's fair to not cause discomfort to others. Imagine if every flight was as noisy a city intersection. For 5 hours. And you can't hide.