If it makes you feel better, I spent $40 for the one-use gacha under the erroneous assumption that I'd be able to get Shrine Maiden Lycoris with it!
It sort of worked out for me anyway due to some dumb luck with the gacha rolls, and I probably would've done it anyway even if I knew the Lycoris form I wanted was off the table (her new design is so much better than her old one!), but I miscalculated on that one.
Stamina boosting was of great use to me in the last event, if only because I can't imagine flipping all those cards for the stuff I wanted without it. Then again, I'm only LV 58 right now.