Organ and blood donation aside… DNA collection is on a whole different level.
People need to think long and hard about the implications, of which we haven’t even fathomed yet, of providing DNA. Laws (in any country) haven’t come close to catching up with the technology so I’m of the opinion that it’s too risky to let anyone have my DNA and to store it. There is absolutely no way that I’d consent on someone else’s behalf.
Anyone that has used 23andme dodged a bullet when they went through bankruptcy. That data was almost sold to the highest bidder.
When I was diagnosed with cancer I was given a form to opt into ‘studies’. This form had no details on what was going to be collected, how it was going to be stored, who it was going to be shared with, and how long anything was going to be stored. It didn’t mention DNA at all but I assumed that was going to be part of it.
It’s a shame because I do have a relatively rare cancer, but the risk was not worth it. Hell, I wouldn’t even do a dog DNA test on my mutt because I was concerned about unknown consequences.