My eldest (teenager) still loves it. They spend hours dressing up, hanging out with their mates and come back with a bucket of sweets which they don't really want and give to their younger siblings. It's a great night for all concerned and whether driven by commercialism or not, they don't spend much and get plenty from it. Or maybe they should be adults like some on here and spend their socialising money on restaurants and pubs which is far more honourable with no social issues and not commercial....
Round here you see high school kids right up to 18yo and perhaps older dressing up and doing it. Parents dress up too. Houses decorated. People who don't know each other bumping into each other and having a laughter together. Even passing on Intel about good houses to visit that might be out of the way. People take their kids out while one parent or older child stays home to dole out treats to visitors to their house. People who can't do that leave honesty bowls of treats out and nobody steals the whole lot they just take an honest amount to leave some for others.
It is pure community spirit from those who want to do it. Those who don't simply stay in and don't decorate their house. There isn't a single negative about it. Costumes get recycled or are homemade still! Decorations get put away in a box next to the Xmas decorations and reused year after year. Including the plastic, fake cobwebs which aren't the spray on stuff. Not completely perfect but no worse than Xmas.
I'm sure you celebrate that with wrapped pressies often not wanted or liked by those who receive it. I mean people still use wrapping paper that is foiled, coated or with some other feature that means it's not recyclable. Cellotape isn't green. Excessive Consumption and consumerism of Xmas isn't any better than Halloween, indeed worse. If you stop celebrating Xmas I'll stop Halloween.