What a limited conception of RPG.
In a RPG you should be able to be anything, not just someone with a thin foil hat chasing windmills with a toy sword or farting imaginary fireballs.
Modders have been trying to expand it with mods like owning a shop, a mine, etc...Why keep timy mind on medieval fantasy RPG ?
Look at EVE !!! You can be a prospector, a smugler, a merc, a tech, and many other professions, you dont necessarily have to be a fighter pilot or a starship commader. You (almost)really do what you want. I have a friend that is a miner a sell minerals, on occasions he smuggles material into sectors, along his sells, ally to a faction for protection why his team prospect minerals etc...
Again why keep a tiny mindset on medieval fantasy RPG, why not be a great Alchemist and have people buy your stuff when you are in. And you pay people to get stuff to make potions or whatever, and when the ingredients are too rare you go yourself for example, because only you have the knowledge?
There is one Key difference you seem to be forgetting here. TES = Single player only. Eve = MMORPG, as in Massively Multiplayer Online Role Playing Game. It has tens of thousands of players on at any given time. It is also(I don't actually know it's actual size) probably a much larger game world, both in actual size, and in Gigabytes. You aren't even comparing apples and oranges, you're trying to compare apples and potatoes!!!! MMORPGs are such a different breed of game it's literally impossible to try to compare one to a standard single player game of ANY variety. I should know, having playing FFXI since 3 months after it's NA release, and having played several MMORPGS before that, including Everquest, Asherons Call, and a few others. Of course there is going to be more of an end-game and more to do in a world like that, there has to be, it's a game meant to be played at the same time as thousands of other players.