Why Did Drogon the Dragon Let Jon Go Alive and Free ?

Wise and Philosopher Drogon.

Game of thrones got ended but the last season was not up to the expectations, Show had shown remarkable thriller and dramatic episodes so Yes its hard to maintain that pace. I felt like episodes were long in the last season still there was a shortage of time to show the context. 

The Last episode followed the tradition of murdering in the last episode of seasons, Jon snow followed the tradition of being the cause of death of his lover. Then he continued the tradition again crying over the body of his lover. After watching the last to second episode it was clear that Dany is going to die and Jon or Arya were good candidate for killer. I thought first Arya will kill her dragon then she will use dragon's face as mask for disguise to kill her.

There were many plot holes in this season, A major part of Unsullied and Dothraki army died in battle with night king, episodes after war with night king showed that there were very few soldiers alive but in the last episode you can see again large number of Dothraki and Unsullied soldiers.

Dany burned down whole place there was no toilet left, so from where she got time for makeup, when she was talking to her army her hair were properly braided and clothes were like she carries a back pack and makeup kit on drogon, maybe drogon has some hidden pocket which opens with some command like prockatris.

Jon snow knows everything even experience of dying, and he married her just for finishing the task he left unfinished in the cave. when Jon started kissing her Aunt in the last episode then I thought ohh he is going out of his character, is it kiss or fear. Later I realized now he knows everything so he also knows kiss is the best way to distract. Dany died Jon is crying over her body meanwhile Drogon who always keeps some wifi connection with his router but this time wifi stopped so Drogon came to check the wifi, but poor Drogon realized router is beyond repair. All this happening and Jon is waiting patiently for getting killed so some red, green or yellow woman can make him alive again. Drogon sensed Jon has killed her mother, he is preparing for breath of fire Jon is still waiting maybe he wants to experience a shower of fire after all he is Targaryen. 

But no, wiser than human Drogon the dragon realized the real reason of death of his siblings and his mother is desire of getting Iron throne and revenge, so he did not take revenge on Jon and destroyed Iron throne literally as well as figuratively. 

So with this logic Dany should learn from her dragon how to forgive people and how to show mercy on innocent people. Martin showed how humans are much worse than animals. I was hoping some philosophical quote from drogon like talking dragon of Hobbit. What drogon could have said. 

drogon: Fuck the philosophy, tell me how to find a hot girlfriend on tinder, Hot!! very Hot oh my god smartphone got burned with hotness.