One does indeed get the impression modern management thinks in isolated gains, with scant regard for larger effect.
But not so with alcohol. The positive and negative effects of alcohol in the park have been known and debated for five decades. It is the Forbidden Fruit. It brings tremendous rewards, the margin on alcoholic drinks is immense, and where there is only so much food and drink you can sell a guest, there is no ceiling to alcohol. The negatives are perfectly well known to management too. A decline in atmosphere, security problems, social issues, aggression towards guests and employees. After 45 years, we now have management who couldn't resist the temptation. That, and a slow evolution of the audience that visits WDW. After to or three decades of moving the park ever lower on the cultural ladder, the current audience feels more favourable to a drunky town theme park environment than before.