GRRM: Here is a character with BELL-related trauma, whose greatest regret is that he didn't burn down an entire town to kill Robert Baratheon. He blames the death of the man he loved on his failure at the Battle of the BELLS, and he vows he will not fail the boy he believes to be his prince's son. He has a terminal illness that is known to eventually drive its victims to madness, and will soon be headed directly to King's Landing. Possibly joining him: a younger and more beautiful potential Queen from Dorne offering an alliance. Again, he is literally triggered by the memory of BELLS.
GRRM: Here is a character who burns the Tower of the Hand with extremely volatile wildfire just because she can't bear the look of it anymore. Her enthusiasm watching the pretty green flames reminds her twin of how the Mad King got aroused by burning people alive. Her obsession with a prophecy around a younger more beautiful Queen drives her to paranoia; she devotes all her attention to destroying a teenage girl while sending anyone she's suspicious/needs rid of to Qyburn to be experimented on and tortured. She pushed her friend down a well when she was 10, and murders her husband's infant bastards. She currently wants revenge on EVERY SINGLE PERSON in King's Landing who watched her Walk of Shame.
Y'all: Obviously Dany is going to burn down King's Landing.