@eniko@opponent019 I think the main problem with that is that, after a certain amount of quests done, "Do this quest, and we'll give you gold and/or new equipment." becomes less of an incentive to do any particular quest.
A main quest helps solidify "There will be another quest after this related to this one, and here's why you'd want to do this quest." - to some extent, the Guild Quests in Skyrim sort of fill that role as well, just...to a lesser extent.