I fully agree with your first sentence but I don't think the amount of people who want to go to space is a good measurement here, since most would not qualify f

I fully agree with your first sentence but I don't think the amount of people who want to go to space is a good measurement here, since most would not qualify for the job anyway. So with all due respect, to me that means your second sentence may well be replaced by "If you want to make the disclosure of medical records a requisite to be an astronaut, don't expect too many qualified applicants to show up for the job".