Usual defence? Odd thing to say since I hardly defend them. Unless youre confusing me with somebody else. Only defence Ive had for them is to say they were always gonna lose as they wouldnt be able to please everybody as somebody would always have something to complain about.
Wrt Dany, youve basically made the comparison and parallel. She went into the fire cos she lost everything.
However now, shes lost everything now too. Her claim to Jon. Her advisor, two of her dragons, missandei and just had Varys plot against her. Jon basically being hesitant with her pushed her over the edge and hence her line 'Let it be fear'. Tyrion was the only sane advisor she had left, and he kept fcking up, so Dany had lost all hope in listening to him and his apologies.
You of course dont agree, and thats fine. But thats how i saw it based on what was said in the episode and how its gone throughout the seasons. She had nobody holding her back and now is taking everything, and what she worked her whole life for, the crown, through fear (which in her mind means doing the opposite of what Tyrion wanted)