They are essentially helicopter transmissions scaled up. I wouldn’t trust my life to a twenty year old helicopter transmission I don’t think.
It’s likely not just the transmissions. Those huge blades undoubtedly flex, and are made of some variety of composite. Here’s a video of one being destroyed in a high wind. https://www.youtube.com/watch?v=KCRoN2NGLYI Even with 20-25 years of normal wind, you wouldn’t want to be near one when a single blade failure unbalances the whole thing.
“I wouldn’t trust my life to a twenty year old helicopter transmission I don’t think.”
No, but you don’t go flying around on a wind turbine either.