Sounds more like your limited time playing, or even your lack of patience (wanting to finish quests quickly etc) are what is making you fast travel, not the game devs. I'll play a lot of times and never finish the quest, but rather spending the time to get to my destination, where I'll pick up at next time I play.
Exactly. The journey is part of the experience. For example, if I'm required to make my way to Riften from Whiterun, I know I'll probably go north of High Hrothgar and pass through that bandit tower to the west of the Imperial Prison, and plan ahead, maybe spend the night in the newly cleared safe haven. Or, if I'd rather not, I could head to Riverwood and try the path south of High Hrothgar, at the risk of encountering Frost Trolls, Haagravens or Wisp Mothers. If I'm going to Solitude, I know I'll have to be careful in that heavy bandit encampment on the crossroads by the Reach. When it inevitably becomes dark, I'll have to find a place to spend the night, ideally with a cheese wheel, a warm fire and a good read. I enjoy all these experiences, and find them just as satisfying as quests, if not moreso. I'm living in the world, not merely following a limited amount of objectives that amount to fetch quests.
It just adds so much to the game. I understand forsaking this for convenience, but I literally never fast-travel. It takes away quite a bit of the magic for me. If I'm feeling particularly lazy or really don't have time, I'll hire a carriage. Other than that, I always go myself. (I don't use horses, either.)