I don't mind the use of these tools for those who want to play that way, but I don't think the above logic is entirely irrefutable. In the real world, those sites aim to eliminate challenge as much as possible - hence the appeal. I am not looking to make an "adventure" out of booking a business trip. But the game needs to provide some challenge. Of course FD could make tools which make everything wonderfully easier. They could also make an auto-pilot. All these features would be very "realistic" for the year 3301. But they have to balance it.
---Edit
I'm not saying they have achieved that balance, yet. But that is what they are trying to do, I believe.
Hiding things from the player can be a way of adding challenge. Fog of war in various strategy games is a good example. Although it is kind of a cheap way of hiding the fact your game
isn't chess and as such probably wouldn't be as interesting if the players knew exactly what the opponent is doing, in most cases it's good enough and even, for games which do it right, allows for
more gameplay and meta gameplay via intelligence/counter intelligence and opens up the idea of
braining your opponent. But contrary to ED, the specifics of every tool at the disposal of a Starcraft 2 player (or a EVE player) are thoroughly documented and you can learn
everything there is to know about the gameplay mechanics themselves by reading a wiki
without removing anything from the actual
game. Because they are focused on depth of mechanics rather than fighting the game before you can
play the game. Which can be skipped by a simple google search anyway. And they are designed well enough that even if you had perfect knowledge of the opponent's actions, there would still be a game to play.
In short, hiding things can be an
element of your game, but it can't rely exclusively on that. The only ~challenge~ when trading in ED
is finding a trade route, and considering it is extremely mundane and mostly down to luck (because although the archetype of the perfect trade route is known, you can
not accurately, even with the best brain in the world, predict where it will be) I can't blame people for wanting to skip that part. And then I again can't blame them for complaining, after they have found a good trade route via a 3rd party tool and figure out there is barely a game left to play after that is done.