An opinion you're probably all alone with?

[Ignimortis]

I see no reason not to include fast travel and quest markers as an option. Sure, there are plenty of people who don't like them, but they can just not use them. If you take them out of the game, though, the game is made worse for the people who do want to use them.

That is a somewhat faulty take on it. Automatic Fast Travel being available and quest markers existing heavily influence how quests are designed.

Consider Oblivion's questlines that make you hop all over the map in the span of three or four quests, much less the entire quest chain - you can easily go from Leyawinn to Cheydinhal, from there to Chorrol, and from there to Leyawinn, and then to Anvil again - to resolve maybe three quests. With no native travel option that isn't "walk there" or "fast travel, we've even unlocked all the towns by default for you". If you deign to not resort to that, you're in for a trek across most of Cyrodiil - three times in a row. And this is a mild example, there are questlines which expect you to visit Leyawinn (at the southernmost end of the map) five times and come back to northern cities every time in-between.

Consider Morrowind's quest chains, which are noticeably more logical in how far they send you, and the travel system pretty much ensures that most places aren't far from "legal" fast travel between towns. When you're being sent far into the wilderness, it's the sign that it will probably get tough.

Same with quest text and markers. While Oblivion is partially playable without quest markers (not always, though), Skyrim is simply not. There is not enough quest text to even remotely understand where the quest giver wants you to go without a marker.