So? KOTOR is a 12 year old game made by the same people and it didn't do that.
And KOTOR did not feature open worlds in the same context as ME1 or even DAI. The locations in KOTOR were essentially corridor experiences.
With ME1, they made massive open worlds to give the player an excuse to traverse with the Mako. In order to give people a reason to land on a UC world, they came up with the UNC missions to go find dogtags and other items which gave you some XP and some lore content (like the letters in DAI).
Also to a degree, KOTOR did have fetch quest but like TW3, it was masked very well through aspects such as storytelling. With ME1, it wasn't masked so well because there was no hardcore storytelling that gave you purpose to go find some long lost Turian dogtag or Asari Matriarch writings other than a journal entry telling you to do so. Compare that with the trials to become a Sith on Korriban, or the murder trial on Manaan, or the bounties on Taris and you'll see the difference
In the end, I still believe that the lack of cinematics in these large open worlds in DAI had a large effect on the fetch quest really standing out because they felt very MMOish. Because of this, even fetch quest in SWTOR is more enjoyable than that in DAI.