That's kind of stretching things a bit, Ganit. The journal is actually written in the form a diary. Pay strict attention to the wording. In most cases it's exactly as though you're writing this stuff into the journal, yourself. It's a big leap out of what little reality can be present in a fantasy game to think of this in Elder Scroll terms. As implemented, the journal is actually a kludge by the developers to insure that the player doesn't forget about quests. That's probably a good thing, in and of itself, but if that's what it is, then the wording should be crisp, official, and not presented as though the player wrote it there. It would be no more artificial than is the HUD or inventories with potentially hundreds of objects and nowhere obvious to put them.
Actually, I'd prefer the journal to be a real journal, where the player can actually write the things he wants to write into them and to indicate those quests he wants to accept and those he declines never show up in it. Oh well, it's an irritation, but it's something I'll put up with because I really enjoy playing Skyrim in spite of all its little bugaboos
The Journal system in Skyrim is in an uncomfortable transitional phase from earlier editions. In Daggerfall, for instance, you could actually make notations in your Journal. In both Morrowind and Oblivion, it actually looked like a journal, to the point where you actually had to flip through pages as you progress through quests, read the damn thing and figure out what you're supposed to do.
The Journal in Skyrim, on the other hand, is more of a functionay tool than an atmospheric ones. The writing is a throwback to what it was once, but it really bears no more resemblance to that anymore. As such, i don't even consider it a journal, regardless of the wording. It's a quest tracker, plain and simple.
There is some annoying railroading in Skyrim. The Theives Guild and the Vigilant in Markarth being the most prominant of that (though, if you want 'evil' you'll probably do the Theives guild anyway, their less savory this time around). The main quest, however, isn't part of the problem. The main story in TES games is supposed to be railroaded, because it's about saving the world. If you don't want to save the world, don't do it, plain and simple. We're not talking Fable or Mass Effect here, where at the end of a railroaded questline you get to make a totally arbitrary choice between good, evil and evil-ish.
Don't want to save the world? Fine, let Alduin eat it, just ignore the quest line. Even as an evil character, though, you can fight Alduin and save the world, just do it for selfish reasons. If he eats the world, you have nothing left to loot. RP problem solved.