Nope, he's correct, and his synopsis would make a great episode of "How it Should Have Ended". The protagonist wasn't an idiot, but the rest of that is accurate.

There's a ton of other stuff in the movie that attempts to make the case against testing, but IMO it's all overshadowed by the main plot wherein a failure of testing likely results in a major problem for an important mission.

You'll have to remind of of the part in the movie where dude's presence on the mission is a problem for the mission.

Or, wait, is that just your conjecture? Sorry. My bad.

He was the navigator. That seems kind of important. If it wasn't, why would they bother to bring him along?

You either missed or evaded my point, simply to re-state your own. (Also: nice shadow-edit.)

I don't see where I'm evading or missing your point. Perhaps you could explain? And I didn't make any shadow edits. You sound rather paranoid.

Did he die during the mission? Did he really have a heart condition?

He really had a heart condition which put him at high risk of death during the mission. That is stated in the movie. We don't know if he died during the mission, but I didn't say that, merely that it was likely.

I'm pretty sure that in the movie they say that the genetic tests point to a high probability of a heart condition.

It's left ambiguous as to whether he actually has a deadly heart condition.

There's the scene with the treadmill, but that can just be to show that he is normal.

Perhaps that happened in Gattaca 2 because the movie ends at the launch and there is no problems

It's stated that his heart condition is likely to kill him before the mission is over.

This is like, "Perhaps that happened in Thelma & Louise 2, because the movie ends with them alive and in midair."