Let's not conflate being disruptive and alcohol - there can be disruptive passengers on airlines that are completely dry.
IATA themselves say out of the reported cases to them only 23% involved alcohol or drugs.
The vast, vast majority of flights proceed normally with no incident. Alcohol is enjoyed - responsibly - by many, many, many more passengers.
To ban it as a response to increasing disruption incidents strikes me more as a moralising fulfilment exercise rather than a sensible, proportional response to an issue that is more efficiently fixed by enforcement of criminal and civil penalties (and banning passengers).
We see passengers getting into fights and abusive with crew because of seat recline, especially in economy. Should all economy seats - even on long haul and ultra-long haul - be fixed upright with no recline possible just because of the actions of a few? That is the analog of an alcohol ban.