This idea of "stronger ties" is nonsense. 3/4 protagonists will have 0 ties. Do you somehow think that CEs don't have ties to their past as an elven people? The CEs we've seen in DA:O don't know very much about their history, but to say that the Dalish care more or have stronger ties because they've built their racist fantasy about a racially pure utopia is wrong.
The CEs, right now, are the elves actually being abused. They're the ones that suffer. The ones that live in poverty. The ones that are being raped at the whims of powerful human nobles.
Dalish culture is not based on defiance of human rule. They fetichize what they do as defying humans, but they defy them about as much as the CEs do. The only acts of defiance we've ever seen in-game is the murder of a few unarmed peasants and Zathrian's blood curse. We have stories about the Dalish raiding and butchering human caravans, but to say that this is somehow "standing up" to human rule is pretty silly. Their attempts aren't even at the level of "annoying insurrection".
A powerful and influential CE would actually be fighting real oppression. The Dalish don't live in the same opulence that wealthy humans live in, but to suggest that they have it rough compared to the CEs is an insult to what people undergo when they're stripped of power by a racist and uncaring society.
But we're not disagreeing that the City Elves are being abused, which they are being, horrifically as shown by the CE Origin, the Alienage Purge and the Tevinters being allowed to sell them into slavery in Origins, as well as the events of TME.
But to say that the Dalish don't have it rough isn't true, as they are constantly forced to be on the move and never able to put down roots, lest they see their people wiped out. In the Dalish Origin, even if you let the three humans go, they still raise the entire village against them and force Marethari's clan to quickly up sticks and leave. They are left with only the fragments of a culture and unable to build a new one, until they have a home once again. It's not the same level of persecution and suffering as the City Elves, I know, but still yet another form of subjugation at the hands of the humans of Thedas.
As for the stories of the Dalish raiding, they are at the moment, simply stories that we've not witnessed first hand. While there are militant Dalish to be sure, and some who would probably do raid human and elven caravans, all we have to go on is; Genetivi's codex, but he's an unreliable source since he doesn't even know that they were Dalish until he was told later, Zathrian descending upon Lanaya's abductors, but he did it more because he hates humans for his own reasons, and Velanna, who was tricked into believing humans had abducted her sister, did so against the wishes of her clan and was kicked out over it.
I agree that the Dalish have an overly high opinion of themselves at times, but I don't think they believe in a racially pure utopia. Their value on Blue Blood is no different than any other culture in Thedas (barring the Qunari), as well as those individuals descending form the old families being the ones who typically show a strong affinity for magic.
The Dalish Warden does not receive any special treatment from the rest of their clan, despite being the child of the previous Keeper and thus likely having some ancient royal elven blood themselves.
As for Pol, I doubt they were hanging that sword over his head. He was with them for 4 years before his death at the hands of the Vanterral, so it's not like they demanded he immediately get tattooed and forsake his old beliefs, or risk being kicked out. Same with Feynriel who was with them for 3 years and despite getting some distrust from the others due to being an elf-blooded human, he was accepted with relatively open arms and the clan were even willing to fight the Templars to prevent them taking him.
Of course, this is Marethari's clan, who seem to be more enlightened and accepting than most.