Hi Janneke,
Thanks for getting in touch!
Tickets unfortunately do need to be created for each event in the event post.
That said, there is an open feature request for this and it would be awesome if you added a vote to it. Looks like it’s gotten a few votes already but could definitely use more. I can also see how super helpful it would be to have this built right into the plugin because it would be way easier to set up tickets for events, just like we do for default ticket fieldsets.
Sorry to be the bearer of bad news, but does this at least help answer your question? Please let me know.
Cheers,
Geoff