How many times has jon chose the “honorable” or “righteous” thing over love or any other emotion for that matter...

If varys is driving dany to “madness” by orchestrating scenarios (ambush killing rhaegal) he might be doing so knowing that if jon has to make a choice between unhinged dany and the people of the seven kingdoms he will chose the later

Qyburn could also be plotting in the same way just with cersei ... I mean dude resurrected someone who almost killed him (the mountain). And now fully has cersei’s trust...

If both dany and cersei are cleared off the board then they both could see the realm as having a chance...

We’ll see soon enough though... everything I am saying could be bullshit in a few hours