In theory, yes. In practical application, you're wrong. For example, Trump immediately issued EO's undoing Obama's EO's regarding the border. But a court said that Trump couldn't "change the law". Eventually Trump won, but it took forever.
Executive orders carry the authority of law, and can only be changed by the same rule-making process that created them under the Administrative Procedures Act, which IS law.
That means it will take Trump well over 3 years of his term to implement Schedule F in a way that won’t be reversed by the federal courts.