Complex sentence: The report further argued that excessive specialization would be counterproductive and thus detrimental because it required long tours in Indochina, which was deemed to be detrimental to the health of the specialist.
Split into simpler sentences: The report further argued that excessive specialization would be counterproductive and thus detrimental. It strongly opposed extensive specialisation because it would have required long tours in Indochina, which was deemed to be detrimental to the health of the specialist.