Sorry, I stand by my comment. I'm angry that the OP has started a thread with a very unclear statement not back by fact that has led a number of posters to make sweeping comments about a process, many of which are simply untrue.
And I'm therefore trying to establish the data source. Note, I'm not saying this isn't true but the specific data set is valuable for a proper discussion. Is it live transplant or deceased? This makes a massive difference? Is this developed or developing world (this then opens up organ trafficking and selling debate) etc.
And I'm not 'making it all about me' but myself and my friend are actually one of those statistics so I'm sharing the feedback my nephrologist gave me. Which is despite who may want to donate, (anecdotally) men's kidneys deteriorate faster than women's and the threshold to donate is minimum 80% kidney function) which is extremely high. If we take this as read (again, it's one nephrologist so not a sample) then the debate is around health and lifestyle and it may be women who are more likely to 'go on' to donate but doesn't include those who came forward to test. Again, data set would be useful here.
My point is, without the backing data it becomes a complete mishmash and speculation rather than a focused debate on reasons why that is around the actual data pool.
Most studies people have posted are sample size and very old (15 years) in some cases. I've been trying to find actual up to date data on live transplants for all organs by gender and can only find it for deceased.
I am not challenging that the opening post is wrong, I'm saying it's unhelpful to start such a debate without setting out the source.