I think that analogy proves too much. You could also survey people on whether they “want to go to the doctor more often than they do”, and if they said yes, you could shrug and say “well they don’t do it because it costs a lot of money, that doesn’t seem like a tragically unmet want”. What’s the limiting principle behind “if people don’t do something because they are responding optimally to their financial/effort costs, then public policy doesn’t really need to help them do it”?
I think that analogy proves too much. You could also survey people on whether they “want to go to the doctor more often than they do”, and if they said yes, you could shrug and say “well they don’t do it because it costs a lot of money, that doesn’t seem like a tragically unmet want”. What’s the limiting principle behind “if people don’t do something because they are responding optimally to their financial/effort costs, then public policy doesn’t really need to help them do it”?