Shakespeare's Romeo and Juliet and a lack of common sense

I just watched the BBC/TIME LIFE production of ROMEO AND JULIET from 1978..  A very young Alan Rickman played Tybalt.  Sir John Gielgud played the Chorus.  I was actually in a production of the play several years ago.  I have seen a number of film and stage productions.  It has been a while since I had seen any.  It was nice to go back to the play and view it again.  (What I write contains SPOILERS for those not familiar with the play.)
    One thing that strikes me that has not struck before about this play is that no one really uses their brain in the play.  Or if they do they do a bad job of it.  Everyone follows their passions.  Obviously, Romeo and Juliet follow their passions.  One day they meet, the next day they are married, and a couple of days later they commit suicide.  The quickness of their courtship may have been a plot device that Shakespeare used and then again it may not have been.  Shakespearian scholars debate this.  Nevertheless, they still follow their passions and don't use good common sense.  Granted, Juliet is only 13 years old and Romeo is a couple of years older than her.  I remember in a DICK VAN DYKE SHOW Rob (played by van Dyke) says the play is about two stupid kids who run off together and wind up dead.  That's funny but there is truth to that. 
     Other characters in the play either totally follow their passions or just lack good common sense.  Tybalt is a hothead in the Capulet family who wants to kill Monagues.  Mercutio (not a Montague) picks a fight with Tybalt for no good reason and of course gets killed.  Romeo enacts revenge on Tybalt and kills him (this is just a couple of hours after Romeo marries Juliet, Tybalt's cousin).
     Friar Lawrence who should be empitamy of wisdom makes some really bad decsions.  When Romeo tells him about Juliet he chides him saying, "Hey, you were pining for Rosaline and now you want to marry this girl you hardly know."  He marries them anyway thinking it will bring peace between the warring families, but it doesn't.  It just leads to tragedy. 
    When Juliet's parents want to marry her off to Paris the Nurse tells Juliet to marry Paris even though she is married to Romeo (who is now banished).  The Nurse knows she is married.  She goes to Friar Lawrence who gives her a draught that will make her appear dead for several hours.  Maybe Friar Lawrence, or the Nurse, or Juliet should just tell the parents the truth.  She takes the draught and everyone thinks she is dead, including Romeo because he never gets the message that this a trick.  He commits suicide so one can say he isn't thinking straight.  He kills Paris in a fight before he kills himself.  When Juliet wakes up and finds out what happens from Friar Lawrence  he doesn't stay with her to see if she will doing anything rash, which she does.  She kills herself, too.  Then to add salt and open wound one finds out that Romeo's mother died in grief that her son was banished.  The only good thing that happens at the end is a reconciliation between the fueding families. 
     Yes, it is tragic that Romeo and Juliet commit suicide.  What is more tragic is that almost everyone acts on their passions and nobody uses their brain, which leads to the tragedy of Romeo and Juliet but also the tragedy of Lady Montague, Mercutio, Tybalt, and Paris.  The moral of the story is that people need to match up their heads with their hearts.  Sadly, in reality, people don't often do that.