Zelensky was clearly meant to 'go' from the beginning as a part of the package of suing for peace that Trump has to bring to Putin.
This just gave Trump and Trumptards and domestic Ukraine alternative politicians a perfect excuse to purge Zelensky next, and some public toughness display points for Trumptards right away. That's why they brought him out so publicly to shame him pointlessly.
However, for Zelesnky it would be the same have he talked back or not. But, it's not like he knows anything now in his coke head. For him, the best deal he could possibly make is personal freedom for him and his wife, with some part of stolen money, for saving his life.