Easy way to toggle calendar visibility? Select/deselect all Calendars

The NC calendar app provides me with the option of showing or not showing the events of a calendar.

What I am missing is the option of selecting or deselecting ALL calendars at once, better yet would be the option in a calendars context menu of “show this calendar only”.

Why?
Because I do not want to go through my 20+ calendars, deselecting all individually to only show the events of a single calendar.