Justice Jackson says we would have the opposite problem if the president
wasn't
chilled. The most powerful person in the world would be unrestrained if there wasn't a threat of criminal liability and it would essentially give the opportunity to turn the seat of the presidency into a crime center (paraphrasing).
https://i.imgtc.com/d9Fc4Qq.gif https://i.imgtc.com/BKHTxYq.gif
https://i.imgtc.com/vYYIuDx.jpg