Since I am not familiar with the latin "lato sensu" concept, and since a quick google search didn't really clear up the idea, I will relate to your usage of "wisdom."
I can see your point that wisdom requires a degree of flexibility. However I do not see that belief systems are necessarily in conflict with wisdom. It is my perspective that my belief system (as I cannot really speak for anybody else) works in harmony with wisdom. Granted, wisdom does not bend in some cases.
For example, I consider it wise to accept counsel and advice from certain experts while I cannot accept the advice of others. This is wisdom built on beliefs and they do not oppose one another but instead compliment eachother. I would take the advice of a mechanic on how to correct the clink in my car but not on how to correct the pain in my arse. I believe that the mechanic knows about auto-repair and that a doctor would be better to prescribe an enima.
Does this make sense or am I missing some important ideas?