It's an open world game. People can play as they want and the tutorial shouldn't jam them into one rail before they even know what's going on or know anything about the world. You guys seem to all be totally missing the point.
Wrong.
Just because something has an "open world" doesn't imply that you should necessarily be able to do whatever you want. I mean, that would be like claiming that, in the latest Zelda game, it's "wrong" that you can't have Link join forces with Gannondorf and subjugate Hyrule.
And cutting off
one particularly frustrating option so that new players can't fall into a trap is a
good trait for a tutorial to have, not a bad one.
Now, if the tutorial forced the player into conflict with Tri-Tachyon or the Sindrian Diktat or etc., -
that would be worth complaining about. But it doesn't; there are still
plenty of "rails" left available. And, as has been noted elsewhere, if you really want to play as a pirate - the option's still there.