What would be the point of credentials if they cannot be given or revoked?
This is lunacy.
And as far as I know Freedom of press gives them freedom to publish any information not to get information.
The point is there is a set procedure on how you go about removing the credentials of a member of the white house press, and they ignored them.
The member of press gets a notice, they get told why, they get to present a defence, and then they get removed. With this, none of that actually took place. A member of the press offended the President with some questions, boom. They get removed.
Now, if the President has the power to randomly remove the press from the White House because of that, how many Journalists will ask him questions he might not like? That's a bad precedent and creates a certain aura of intimidation of the press which reduces the nature of free speech.