One of the most mind-boggling things Bungie has done since release.
It makes no sense. Of all the things to worry about in this game, it's so silly.
I want to make a list "Top 10 Destiny Head Scratchers" since release. Stuff like:
-vanilla planetary material farming
-probably a million other vanilla design decisions I've repressed by now
-Buff Thorn way too much then ignore it for 6 months
-resetting exotics in TDB then adding RNG for when Xur would sell your exotic back to you except it was a random version so you lost your armor stat rolls
-Crota's End exotic chest in the Abyss where anyone can solo it, yet Deathsinger phase gives no loot whatsoever
-HM Scrota... LAN cable patch that glitched out an already glitchy fight, Lv33 enemies, Majors everywhere, Xur mysteriously stops selling heavy synth
-Release Skolas with Solar Burn, ruining one of the game's best encounters. Nerf GHorn because too many LFG posts demand GHorn to kill Solar Burn Skolas.
-Prison of Elders in general and elemental primary drops in particular
-Make amazing secret Spindle mission that everyone loves with incredible loot to match the challenge. Immediately announce you'll nerf Spindle's Light despite nobody wanting that. Release two patches without actually nerfing it. Eventually nerf it anyway (presumably).
I'm sure there are a thousand other ones but that's off the top of my head.