YOU are the one confusing luck with skill.
Everything in this game is luck based. Every chest is random. Random lag. Even random combat numbers. The skill is in manipulating the numbers in your favor.
Sands has much much much lower drop rate and the quests themselves are harder and longer (although still easy the to u14 destiny en/eh easy mode).
Sands= very long much harder quest. Very low chance of a shard even dropping. If a shard actually drops thereby about 1/200 chance it may be the one u need. Even less chance if is ultra rare like thornlord or ring of spell storing
Efens =easy 5 minute quests can solo claw/last stand/fathom in 5 minutes. Can shorthand deeps in 5 minutes. GUARANTEED SHARD DROP from deeps. ~1/50 chance of being shard u want. No ultra rare shards
Bottom line. If original poster had proposed something logical like maybe a sands trade in i might have agreed. But to easy button the easiest epic in the game (and yes it is even easier to farm than house p) is just plain dumb