Actually, making wind-generators out of carbon-fiber makes a lot more sense than park benches. The former needs to be light, the latter, heavy, to discourage theft or being tossed into the harbor. I see the dilemma of the program's administrators, tho'. 
If they actually made things people buy they'd be accused of competing with the private sector. So they have to choose demonstration projects that only fringe elements (pickle ball players) or the public sector (parks personnel eager to spend their budget so it doesn't get cut the following year) want. 
It's too bad they haven't been able to attract interest from private manufacturers in their recycled product, but then if there was any interest in used carbon-fiber Boeing would have already found it and exploited it. 
That the genuine geniuses at Boeing didn't think recycling carbon-fiber was worth it and chose to send it to hazardous waste dumps is a comment on the hubris of our local "geniuses" who thought they knew better. Dumbist.