Yeah, I went with the extra margin for the total of ~5000 years for Thedas humans, given they supposedly came from Par Vollen 'many thousand years ago', for which there's no exact records.
The Inuits example is interesting to me in the sense, if you want to argue that today Inuits are dark skinned because they're recent migrants coming from areas farther south where the sun exposure had impact on their current appearance... then actually humans in Thedas mirror that -- they are said to be recent migrants from (sub)tropical areas of their world, and similarly didn't yet live in their new place for long enough yet to adapt to these new conditions. As such, the majority of them being white skinned is very arbitrary and not really grounded in "but but the limited sun exposure" -- they could just as easily be Asian and/or largely (and more sensibly) dark skinned, and it'd actually make more sense.
The Inuit are an interesting example of a people not, or to be more specific, less subject to environmental pressures because it may be that their diet ' sidestepped' the need for paler skin. One explanation (there may be others, and I am not entirely sure this is the one that explains all) is that their fish-and-meat diet contains enough vitamin D for them to ' keep' dark skin, rather than 'paling up' so they can synthesize enough vitamin D themselves.
It would also explain why the Inuit and some of their close kin in Siberia tend to be a bit darker than other East Asian populations directly to the south / southwest of them.
On the European side, things are also pretty complex, because recent DNA evidence suggests there may have been a 'whitening up' of a population of predominantly recent Middle Eastern farmer origin during the Chalcolithic / Bronze Age, the result of migrations from further north and east, the ripples of which also spread eastward and southward beyond Europe.

Ainu: Bearded, relatively light-skinned East Asians, but definitely not European.
The net result is a range of skin tones that on a global scale is roughly what you would expect, but with lots of exceptions and nuances.
Other than that, I'm with those who feel that Thedas is ' arbitrarily' white, because there aren't any in-universe reasons why Thedosians should be ' white', nor that it is possible to discern any sensible worldbuilding rules in this regard. I myself tend towards two reactions: ' why the hell don't they straigthen things out' (aka quickly expanding the lore and including + rationalizing stuff) OR 'Apparently anything goes, so why the hell not, three cheers for equal opportunity & all that'.
I tend towards the latter, even if intellectually I would prefer the first I guess.
Thedas just isn't a particularly meticulous case of worldbuilding, and expecting it to be otherwise is probably futile.