advice of constance in 2011 three musketters ignored

the advice of Constance in the 2011 version of Alexander Dumas's three musketeers  was ignored i think. Costace made the remark about how D'artagnen while good in the sword department was lacking in wit in other departments. this could be interpreted as his failure to use magnts to absorb the bulets or disarm his enemies. i note  d.artagnen was shot early on in the film . there is also the scene in the inn where porthos,aramis,and athos speak of how the musketters are obsolete.perhaps magnets could have   done this even more. in addition there is the crack richiliu the villanous cardinal makes in the film about the intellect of king loius the monarch of france. loius seems to only be concerned over whether buckingham wears green or blue
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another thing which has always bothered me is the title of duke. it is like say the dick of so and so has arrived for peace talks.  i mean that is what was said in the film .if you go by the origianal spelling.other points again there is option to use magnets against flying ships equipped with cannon which both sides have at least one of.i am sure with extended footage in film these would fight without magnets .there is also a song at the end about how when we were young and foolish we did not understand the price of letting othrs be strong and everything was what it seemed.