Probably the same reason this Dalish Clan is the easiest to get into yet they are in the most direct danger then any clan we meet in the series. The fact we can walk up and talk to the Keeper with no problem not a single guard stopping us at all or even questioning why we are coming near them yet they are complaining about The Freeman. This clan seems to be just to be there so we can say there is a dalish clan in DA:I. I have to earn your favor to trade but your letting me get close enough to just steal your goods. Makes no sense.
Well, possibility of getting close "just like that" was one thing (gameplay-story segregation and mmorpg style at work) - the fact is, however, that this clan seemed so overwhelmingly... underwhelming. There's so little people, grouped in such a small area, the halla are for some reason the most common animal in area and they're TINY, how can you ride something like, especially compared to the fact that the actual in-game mounts are so... big? And how can you make those tiny halla draw those Aravels, that - by the look of it - seem designed to be drawn by something more the size of those harts you can ride...
They would make a decent ruin-investigation party rather than the core of a clan... Oh, and then there were those aravels - I understand "landships", but those guys are nomads, they literally spend their lives on the move. Aravels could be ornate, could have some sail-like decorative elements, but still, above all else, they should be practical. I know it's fantasy and I know rule of cool is important, but still... I really tried to keep my willing suspension of disbelief alive there, but I just couldn't.
Seriously, perhaps this once I would just go and kill them, given the chance, since they were clearly a bunch of demons masquerading as Dalish. Real Dalish (or any real wandering people for that matter) would at the very least have wagons that could... I don't know, ride in various terrain and be drawn by the animals they were supposedly using for the task. Construction allowing them to protect the cargo from elements would also be preferable to those multiple, huge "sails" lacking any apparent practical purpose.
EDIT: I go to bed, I started ranting, sorry