I think the LGPE demo was more widespread than that, as in it gave people a lot of chance to attend across the world, compared to XY. (Even I managed to go)
It’s just that poketubers helped the process for people who couldn’t attend ><
That Would be a good reason to not release the demos, tho to be fair they did try to reduce the content in SM demos. The only reason why the stuff was datamined was because they screwed up the downsizing process.
If they didn’t screw up the process, then people wouldn’t be able to datamine stuff.
To not release a demo for that reason, is akin to giving up. It’s like punishing the fans simply because they’re incompetent.