If we are born with something then there is a reason for it. Just like tonsils.. we do need them for something. Just because we can 'thankfully' survive without certain organs, doesn't mean in the long run we won't come down with certain diseases due to their absence. Gallbladder removal is barbaric. There are a lot of natural remedies that will take care of stones that doctors will never tell you about... they'd rather be jack the rippers then learn about natural remedies.. In this day and age of the internet it is up to 'everyone' to do their own medical research and treat yourself with natural remedies before getting torn apart by so called doctors.  And just because these so-called intelligent 'researchers' cannot find a reason for a specific organ doesn't mean there is 'no' reason.. just means they 'really' are not as intelligent as the world would like to believe they are, since they are all we have to do the research.. they are just humans like us.  Maybe if they used a little common sense and a lot of intuition they may just come up with some good enough theories they can 'then' try and prove.