Trusts are great for levelling and learning in a dungeon environment that isn't stressful, allows you to engage with the content at your own pace and get to grips with high level abilities and fight mechanics. Were it not for Trusts I'd be stuck leveling via FATEs and beast tribes which are NOT good for teaching abilities or mechanics. I do not do dungeons with people I don't know because it's an unpleasant, unfriendly environment that is far from stress-free. Thus far I've levelled my RDM, BRD, DRG and DRK to 80 this way. Levelled my SCH and SMN via the MSQ (but I don't play SMN) levelled WHM via the side quests. I'm happy to run content with friends who understand that it takes me a long time to learn fights and co-ordinate skills because I have directional issues. I don't wish to inflict my problems on random strangers, nor do I wish to be abused by them and told to 'git gud' even though I am far from being a lazy player who doesn't care to learn. I love the game and I'd be happy to run with folks if the community was more friendlier and more inclusive. But it isn't. So I need my Trusts