That's the disheartening part. Most hadn't used Hangouts before, one person suggested it due to social distancing, ~1hr into Hangouts call as we're struggling to add another member I introduce Jitsi and paste a link into the group chat. Used for ~15 minutes, then dropped and the manual invite process for hangouts began again - organizer couldn't find the option to generate a sharable link to a Hangouts call (it does exist).
... but why? Is it just a familiarity thing?