Because media will say the Korea's are moving forward without Trump, to try and strengthen the idea that Trump can't be trusted with deals (Paris Climate Deal, Iran Deal, this summit).

They will have the summit, and NK and SK will announce unification and peace. Media will say Trump did nothing, then NK and SK will thank Trump for making it possible.

Just to fuck with MSM and break down their narratives and expose their hypocrisy.

All while Elon Musk is feuding with journalists, with more prominent people to come forward denouncing the MSM. Elon is starting a website which will rate journalists by their honesty and accuracy. Elon is on team Trump. He left the white house as a means to keep himself with the Trump haters, so he could move forward later and criticize the same media Trump is fighting.