First of all, seeking to derive sense from this sort of stuff is a dodgy endeavour in that it means, in part, buying into the whole delusion.
What is meant here is that the psychosomatic illness adds value to the survival of the aberrated individual. For example, an asthmatic may be able to derive greater consideration because of the illness - more attention from parents, sympathy from friends, as well as an excuse to avoid unpleasant physical exertion. Because the individual is aberrated due to the reactive mind being present and "in charge", they don't realise that the asthma condition is a part of "the trap" which prevents their inner thetan from realising its full potential. Instead, it supports the reactive mind's actions of inhibiting the release of this potential which, of course, Scientology will help with.
Giant rolling bollocks, for sure.
You know picture the problem above your head and such. 
This is just typical Hubbard spew. It doesn't have any meaning beyond that. You can sit around all day and invent "meanings" to it. So what? Then all you've done is some of your own spew. When you work away at "understanding" it and finally say, "Oh, now I understand what he's saying," Voila! You've gone the exact step intended by this freak Hubbard entity, self implantation.
