some material in iter are not relevant for future reactors, true. But some yes and will face a fluence that is n order of magnitudes higher than what has been tested in jet, the most powerful tokamak so far. so it's a "half-way" demonstration. in any case materials are not everything, iter will test remote handling, breeding, long pulses, etc etc.
we can argue that tokamak are not the right path but at the moment is the most advanced so it is worth pursuing it.
not true. if it works it will demonstrate a huge number of technologies that any type of fusion reactor will face. it is just not efficient in pursuing these
fusion research is underfounded while ITER is overfounded. I worked with it and it is clear that 1) it is too big of a step from the previous nuclear fusion reactor. 2) french regulatory agency is being way too strict 3) the procurement mechanism with in kind contribution has been a total failure.
here there is no power generated as it's not working with deuterium-tritium. most of the heating will heat the plasma and a fraction of this will reach the cooling system. To make a comparison ITER is expected to have 50 MW heating for 400 seconds approx. = 20 GJoule. Using a DT mix will result though in 500 MW Fusion Power