Currently people equip bad or no equipment to assure that they only get the Crystal Tower raids in alliance roulette, because they are fast and easy instead of undesirable alliance raids like Orbonne that a newbie might need for Quest completion. In the future they would not even have to do that which is somewhat obvious when done. They could simply lock an easy to play job at level 59 and will never have to help new players complete the other alliance roulettes but they'd still get the roulette rewards which are intended to sweeten the deal of ending up in all kinds of content with a random selection of adventurers of varying skill level and equipment status.

If you want to farm specific gear, queue into that dungeon directly or use party finder or duty support as applicable.

The game gives you left hand side appropriate gear via the MSQ and job quests. Appropriate gear meaning, appropriate for the MSQ level and thereby content you have access to. The right hand side gear comes from various of those "don't do yellow quests, hurry through the MSQ, don't do yellow quests" quests.