Trotting out the management as whipping boy routine show a lack of critical thinking and bandwagoning.
PI is a mess, but it is a mess because of a string of social changes (unavoidable) and systematic choices by management (avoidable) killed it.
This situation can't be compare to Horizons in any way.
PI is a mess because someone in Disney management mandated that it be opened to the general public (rather than requiring a ticket). At that point, parents began dropping their kids off and turning PI into their local shopping mall (substituting as a baby sitter). Prior to this change, PI was a place that was enjoyed by adults (primarily because it was one of the best place on property to escape children).
I can only guess that management felt it was either missing out on the "family" dollar or the "local" dollar by charging a fee at the gate. Whatever the reason, when the gates became open to everyone, the teenagers came in and the adults (looking to get away from the teenagers) left. If there were more than 4 brain cells in the entirety of the management at the time, someone would have noticed ... hmm, all the kids that will come in won't be able to spend money anyway (can't buy alcohol) and the adults that they will drive away will severely cut into the bottom line.
Slowly but surely, management went about justifying cut after cut after cut to the entertainment offerings until the place became a relative ghost town. At this point, management could justify closing the whole place down and letting outside vendors come in and lease the land. More money (in the short term) for Disney (with minimal risk), but far less of a unique experience for the guest and, over time, a lessening of the Disney brand name.
Either way, management didn't understand why original Pleasure Island flourished and simply decided it was going to do something else. And they did and it didn't work. And rather than say "Hey, we screwed up and that's why we have less revenue" they had to invent excuses (other than themselves) for why PI wasn't working anymore. This had nothing to do with unavoidable "societal changes" - adult still like to go to clubs, they still like to drink and they still like to have fun with other adults. It is the same now as it was in 1989 when the place opened. Plain and simple, this was a failure of management. And that is why we got a whisper-campaign about teenage gangs and drunks scaring away families (who were never going to PI in the first place) and drunk driving.
They haven't fed anyone any false information.
Keep believing this; it doesn't make it true. Let me know when you find all the articles about drunk driving at Pleasure Island. The ghost town is far preferable and more successful than Pleasure Island circa 1994.