If that’s food for thought, it’s a pretty light meal.
If you spec to be “tanky”, you better still be pulling your weight in DPS or you’re a fail.
If you spec to be support, you better still be pulling your weight in DPS or you’re a fail.
If you spec to be DPS, you better still be durable enough to survive some aggro and you better still be using your skills to create combos for, combo off of, or help to improve the damage output or survivability, of your fellow players — or you’re a fail.
Basically, if you play the trinity in this game, you’re a fail.
But far be it from me to tell someone not to fit square pegs into round holes, so go ahead and trinity away. Your fellow players will most likely cover for your lack of contribution.