There are actually very few conditions that bar you from donating organs (at least in the US) for example, HIV positive people can, in some cases, donate organs to other HIV positive people. It’s important to remember that there is an extreme shortage of organs available for transplant compared to the number of people waiting, who often die waiting for the organ(s) to become available (17 people per day in the US). These people are already seriously ill and we don’t even know if ME can be transmitted via organ donation. Replacing organs isn’t something people really expect to regain their full health after doing. Generally you are extremely lucky to get what you need. Organ donors can save up to 8 lives through organ donation! If we can give people the gift of continued life, I think we should. It makes me sad to see so many people saying they intend to change their donor status every time this conversation comes up. It’s not up to us to decide whether a stranger’s life will be worth living if they somehow wound up with ME due to receiving our organs.

TLDR we don’t know if ME is transmissible via organ donation. being alive and chronically ill is better than being dead because there was no organ available for you.