If that's the case, then what would have to happen would be a popular uprising if such a plot were exposed publicly. One thing the Cardassians would not
want would be to have scenes of troops slaughtering and torturing civilians who rose up. This would have to come accompanied by a few possibilities, for it to work. One would be for Ghemor to stand up and take a harder line towards the Federation. Another would be a special, off-cycle election--to get a leader who is more in line with what the Cardassian people believe is right. In other words, Ghemor would have to voluntarily set a date (soon) to step down. That
I could accept much more easily than the coup.