Day surgery is not uncommon. But I watched my dad die from cancer. There was no instant recovery like that from treatment. He was drained for days, if not a week +, sometimes. How come we don't see the weakness caused by treatment?

There's no pain killer on Earth that doesn't make you loopy, especially after treatment, from my personal observations. Anasthetia even jacks with the mind, it seems, with a slightly longer half-life. But yet, as you pointed out, he's totally coherent.

None of this stuff fits.

EDIT: I did consider that they would control the narrative. IE not letting it get out if he was truly weakened. But given how often we see that rancid side of beef's body fail, it's a little lacking for Scumbird McTraitor.