If you believe that then it pretty much negates every other opinion stated or to be stated on topics such as these.
I hate to tell you this but that is what a foreign minister is expected to say. Further, she's throwing Trump a bone so he doesn't rock the boat in the suddenly smooth waters. As far as the South Korea's Ministry of Foreign Affairs is concerned, there is no harm in allowing Trump to believe he was a critical component in the impending peace treaty. But to proclaim he wasn't instrumental risks damage to relations with the US.
Don't forget that the US and China also have to sign the peace treaty....the Koreas cannot do it alone because of the armistice in 1953 was established by what would become North Korea, China and the US (representing the UN Command). An end to that armistice and a new peace treaty would require all parties to sign off on it.
Do you honestly think "Rocket Man" and "My button is bigger than your button" were the catalysts to peace on the Korean peninsula?
Massimus - "Trump already has democrat support."