Events should also have a publishDate since the post should usually be published before the event is happening.
Not 100% correct. They will be shows for some days since we don't want to clutter the front page with "old" blog posts. If people are interested in all posts they should use an RSS reader.
Wrong: date always needs to be there. publishDate can (and should) be omitted on articles.
Not 100% correct, they will also be shown up to 6 hours after the date so that events that are currently running are still present on the home page.
I don't see a use case for a separate publish date on blog posts. We can still schedule them by using the date field, but why should there be a different publication date from the date that's…
Soll das ein Artikel oder Event sein? Weil Artikel mit Location nicht offiziell supported sind!
Does it make sense to remove the date on articles on the home page/the blog index page