For the same reason that her Palace Guard evaporated and her Ministers and Police were hiding out with a Gatling Gun in the jail across town the night of the Revolution of 1893. There was no way they would die for her.  Then two years later when she with other conspirators came up with a plot to overthrow the new Republic Government with a population of 40,000 Polynesians she could only find 175 to take part.  
No.  Two years after the new government had been established and was working well the people had now had a taste of Democracy and had no stomach to return to the Monarch model.  A model under her and her brother that was nothing but constant intrigue, corruption, and fiscal irresponsibility.

Read all about that night in Lucien Young's book "The Real Hawaii", published in 1899.  You can read the whole account on line just search the book's name, pages 177-193 pertain to this event.