On January 24, 2020, administration officials held a bi-partisan briefing for the full Senate.
I don't understand your second and third sentences. Of course the president has an outsized and individual influence on the decision-making process of the federal government. As you suggest correctly, in my opinion, this makes sense, especially in the context of rapid action needed for war, of which the virus response is analogous.
I respect your right to have an opinion that you disagree with the veto and pardon provisions of the U.S. Constitution, but I have no problem with them, and I do not understand your objections.
Your last sentence gives me the insight I was searching for. News media organizations and Hollywood scriptwriters are among the very last places I would look to learn about the U.S. Constitution, American governmental structures, historical American political culture, and the political and jurisprudential philosophies underlying each of the foregoing.