Why is the presidents growing power a good thing?

It isnt a good thing

Fifty Januaries ago, under a pallid sun and amid bitter winds, John F. Kennedy swore the oath that every president had taken since 1789 and then delivered one of the most memorable inaugural addresses in the American canon. "We observe today not a victory of party but a celebration of freedom," the 35th president began. After noting that "the world is very different now" from the world of the Framers because "man holds in his mortal hands the power to abolish all forms of human poverty and all forms of human life," he announced that "the torch has been passed to a new generation of Americans" and made the pledge that has echoed ever since: "Let every nation know, whether it wishes us well or ill, that we shall pay any price, bear any burden, meet any hardship, support any friend, oppose any foe to assure the survival and success of liberty."

After discoursing on the challenges of eradicating hunger and disease and the necessity of global cooperation in the cause of peace, he declared that "[i]n the long history of the world, only a few generations have been granted the role of defending freedom in its hour of maximum danger." Then he issued the call for which he is best remembered: "And so, my fellows Americans, ask not what your country can do for you, ask what you can do for your country."