Far from pointless ... Rated 5 out of 5 stars
I've used Lightning for many months (I can't recall when I migrated to Tbird ... :) and I'd occasionally encounter issues where I couldn't dismiss a Google Calendar reminder.
Last week it got so bad that I had 12+ reminders. I could have worked-around it by suppressing passed-due reminders but instead, I applied a work-around that was recommended: Lightning + Provider (for the actual connection to Google Calendar). Problem resolved!