Because it's another buggy, crap, quickly scotch-taped together GC that will be gone in 3 days, so they don't care if it works or not. It's just about putting something out to give us "content" no matter what state it is in. Same thing with datacrons. It doesn't matter if they're bugged, OP, turn certain characters and teams into invincible walls, they'll be gone in 4 months anyway. So why fix anything or try to actually balance them?
But don't worry, just relic 9 every character on your roster and you might be able to complete the broken rubbish.
If only CG was able to bring together a small group of players to actually test potential content so they knew what was wrong with it, from a player's perspective, before they released it? Wild idea, but it could work.