Fine.You again overlooked the fact that I was making a more general point, but I'll bite anyway.
Why is LFA a problem? Lemme see. Lack of language, lack of any kind of self sufficiency unless you want to count peeing on the sofa by yourself, random behavioural 'seizures' involving smashing yourself in the head with your fist and/or trying to wrench your family members' metacarpal bones out of their normal position...yeah, disorder.
Lesch Nyhan Disease? I'll let Wikipedia answer that one:
http://en.wikipedia.org/wiki/Lesch-Nyhan_syndrome
Enjoy.
So you seem to be suggesting that these things impede the progress of a life without (added) difficulties and problems.
I take it you are working out of the assumption that the purpose of this world is to facilitate such a mode of life, and since the world obviously doesn't function in that way, it reflects some issue of the creator, yes?