Having only started a bit more than a month ago, if that matters, the only way I can see from your point of view is by assuming everyone is willing to pay a fair amount of real money for a single unit, which they're not.

I have no desire to spend money on this game, so yeah I kinda need FG's.

I'm still hoarding Flower Gems. It's not redundant. The game gives you a choice whether to spend or keep them or spend real money. You are not forced to. You can still get those units possibly with luck with just Flower Gems. That's the adrenaline I had. I'm almost 100 Flower Gems just for Xmas after blowing so much for Apple of Sodom on Halloween. I didn't get her, but I'm not salty. It was fun.