My Case.
I sync my work calendar from company to Nextcloud ( Caldavsynchronizer) from there I share the calendar to my wife, so she know If I’m out of office or how I work. For this case I definitive do not have a need to share the content of my calendar. Same goes for Club activity. I get them shared and reshare them to my wife.
The Nextcloud Calendar webpage is never used for Creating Calendar event. I use Mobile phone (DAVx5), Thunderbird and Outlook.
A club use the Nextcloud Calendar webpage read only shared for showing it on their Website.