even still, 10k gems is very easy to get...
events (especially raid ones) even hand out far more than that if you can do them well enough.
at most, gacha will consume 110,000 gems daily. another 10k isn't hard if you already grinded out that many to pull daily. as for accessories, if you're still using the SR eidolons, you're not ready for those yet
I have like four pages of Disasters in my inventory. If I had LMBd them, they'd be in three pages.
And cost me 600k more Gems.
Spending Gems for the sake of spending Gems isn't worth it. Until I manage to amass over 2m stockpile, I'm not wasting any Gems. Currently, as a EU player, I'm pretty much hovering +-0 Gems income a week. This includes events, as I can't do enough of Gem Quests.