Not really. If I donate my genetic material it doesn’t decrease the amount of money I have available to donate and only very slightly decreases my time.
If there were lots of people who wanted to have kids but couldn’t because of an egg/sperm shortage, and a significant number were likely to donate lots to charity only if they didn’t have kids, then it would be wrong to donate genetic material. We’re nowhere near that situation on either count, though.
Within this context, isn’t donating sperm/eggs the same thing as having kids except that someone else will have to bring them up and bear the costs?
Not really. If I donate my genetic material it doesn’t decrease the amount of money I have available to donate and only very slightly decreases my time.
If there were lots of people who wanted to have kids but couldn’t because of an egg/sperm shortage, and a significant number were likely to donate lots to charity only if they didn’t have kids, then it would be wrong to donate genetic material. We’re nowhere near that situation on either count, though.