I wouldn't say that's the best metaphor for it, If you choose not to breath, you die...You don't die from not fast traveling, I don't fast travel that much in Oblivion, so it's certainly not true that you more or less have to use it. Some of the more interesting things actually happen when you choose not to, but it's convenient to have the option. I understand the argument that you need more options of fast travel, and I agree, but I hardly believe it deserves the vile it gets.
I don't like the convenience of morrowinds fast travel very much, If you didn't have money, you were forced to hoof all the way across the landscape, even when it was near by, you still walked so slow that it felt like forever. Even if you had the money, where you were going was almost never close to a transportation systems, and since descriptions were vague at best, even if they were close by, there's a high chance you wouldn't know until you had walked 2 miles in the wrong direction. I get that it was creative, but combined with the slow speed and no sense of direction, it just svcks the energy out of you. Mark and recall be blessed.
People (myself included) that value Oblivions fast travel system, aren't doing so because it's creative or immersive, but because it convenient. I personally like the different ways you can fast travel in morrowind (even though they really aren't that different), but it's too inconvenient, the price (in energy) is too heavy. GTAIV kind of has a morrowind like traveling system, but because there's taxis all over the place, and that you can actually call (summon) one to you're location, it makes sure that doesn't become inconvenient.
If you could summon a traveling device in morrowind, that would probably help everybody as well, and I'm not talking summon out of thin air (even though that could probably be an option), it could be a call, or horn blow, just something to make you mount come looking for you.
Not if you make it so that you can Oblivion FT on a mount, and then use the road system, nobody gets hurt. You can supplement both systems with a cost for safety (for inns like in Daggerfall). That way, those who just wanna fight, can fast travel without paying for safety, and find battle in 10 seconds, and those who just wanna get moving, can do so in safety. Or If the roads are always Fast travel safe or have a low chance of random encounters, that way the poor and weak can still get to where they want to go fast. Traveling caravans would make for quick hitchhiking, I think there a loads of ways to get around the problem without leaving either group behind.