The federal U.S. Appeals Court refused to reinstate Donald Trump's travel ban.

Section 212(f) of the U.S. Immigration and Nationality Act of 1952 states: “Whenever the President finds that the entry of any aliens or of any class of aliens into the United States would be detrimental to the interests of the United States, he may by proclamation, and for such period as he shall deem necessary, suspend the entry of all aliens or any class of aliens as immigrants or nonimmigrants, or impose on the entry of aliens any restrictions he may deem to be appropriate.”

Congress gave that power to U.S. presidents. In fact, one source says "the past six presidents have all used the executive power to bar different classes of immigrants". That included some Muslims.

So does that decision by the 3 U.S. Appeals Court judges mean Section 212(f) of the U.S. Immigration and Nationality Act of 1952 is useless and meaningless?