This is an interesting suggestion. I would be inclined to agree on the surface, but that’s because I’m a special kind of pedantically pragmatic individual.

Example: Christmas is a time to get together and appreciate your family. Yeah, well you should get together and appreciate and spend time with your family regardless of what flavor greeting cards happen to be on the shelf.

That said, there’s something to be said for having broadly recognized periods of celebration. Should they be as overly commercialized as they are in the US? Should they be tied to specific religious traditions? Maybe not, but let’s not ban all holidays. Maybe we elevate Arbor Day and get a week off work at the Winter Solstice?