Any true fae with one title to play with isn't going to come to the mortal realm. It's got pretty good chances at harassing someone via spiteful legend or attacking high-title fae to get more titles, which is significantly less risky than attacking a changeling with a prop (the only item a Fae would realistically be drawn out by)
Also having your titles out in the real world is safety measure. In the real world, other True Fae can't do jack to you, and they're pretty much the only thing a multi-title true fae would ever lose to in a fight, so you don't have to worry about titles dying in the real world (assuming mages don't exist, because >Mages).
Leaving one title in Arcadia means that you don't have your full mind IN Arcadia, thinking about the story, and instead have a fragment of the knowledge of even a title-less Fae. THIS, this is suicide.
True Fae are undeniably dicelessly godlike. Sure, actors are just powerful changelings, but props (and realms, but that's not really relevant) are hideously overpowered and nigh-indestructable.
Also your logic is inherently invalid. Arcadia is full of dicelessly godlike beings who must have difficult conflict to grow and survive. The only difficult conflicts are with other dicelessly godlike beings. Hmmmm. Hard to see where you'd find dicelessly godlike beings in a realm of dicelessly godlike beings.
For anyone who actually knows Changeling fluff well:
What's your headcannon regarding the fate of 6+ title Kindly Ones?