WebQuests (class)

So, over the past couple weeks the class has been working on a WebQuest. Mine's pretty good I think.
There's an issue I have with WebQuests though, and that's that I don't really understand what really makes a WebQuest special, and therefore worthy of its own individual classification. Maybe I'm not doing it right after all, but I know I'm following the examples given and found in class anyway. Honestly, my big problem with the WebQuest is that I can't really differentiate between the 'Quest and a normal lesson plan other than a WebQuest, by definition, has to use the internet (unless you look at some of the 'Quests we saw in class), and a normal lesson plan has no such restriction.
All in all, I don't really see the point of the strict format of the 'Quest, or really it's efficient use in the classroom. This isn't something I couldn't do just as easily, if not easier, in many other formats. As I know from the teachers around me, a teacher's time is precious, and I honestly just think it could be used better than putting together parts of a unit in this format.
Maybe I'm wrong.. Maybe it's more useful than I see.. Maybe my subjects of English and Art just aren't the most compatible with the WebQuest... We'll see.