[ivxvm]

I think you get the wrong idea. What he basically says is that scientists mostly do science because they enjoy doing it, and everything else he says is a consequence of that. People in general tend to gravitate to activities which they enjoy in terms of process, and science is no exception. Usefulness of their work would be a nice side effect, but people rarely do things purely for result, especially when it's something that requires a lot of time and efforts. Basically we are inherently hedonistic creatures and there's no way changing that.

[sudosysgen]

Scientists indeed mostly do science because they like it, but it's supposed to be that way and it's supposed to be funding managers that are responsible to direct that towards the welfare of humanity. That they don't is a matter of ideology. Kaczinsky made a mistake in attribution of responsibility, scientists aren't supposed to bear that responsibility in our system.

[elif]

It seems you missed this part of the quote

"obedient only to the psychological needs of the scientists and of the government officials and corporation executives who provide the funds for research.”

If you are going to defend the ramblings of psychopathic terrorists because they vaguely resemble semi coherent critical theory, at least read all the words.