You’re evading the point. Your unilateral belief that you understood how something worked doesn’t magically turn that belief into an enforceable term of a contract.
It does, actually, on the official support website:
Clicking on the very first post under the Events heading would have told you all you needed to know. They actually have two separate posts with this information.
It looks like they have touched up the wording in the last 24h, but the same information has been on the website for a long time. This has been how events have worked for well over 18 months.
Of course, one can file suit on almost any issue. But it looks like a dog of a case to me.