People talking positively about pain (and especially immediate post-surgical pain as in the article) makes me uneasy. Sure, some level of pain is useful as a warning sign. And wanting painkillers primarily to avoid resting is unreasonable.
But, if there is too much pain, it will cause extreme stress during the day and they will probably be unable to sleep at night - it is hard to imagine this being beneficial for recovery.
Also, if the pain is too great, people will avoid future treatment, even if it is medically advisable.
I think there have been problems with anesthesia in the past, where people woke up during surgery (although still unable to move), and I think it led to negative outcomes even though it is only pain - although I admit, I am reluctant to look up the details.
At the very least, I think it is good to give enough pain medication so that the patient does not want to die, although I understand it may be unavoidable when the level / duration is high enough.
It looks like in the article, the level of pain and recovery for this procedure is not very bad (probably because it's laparoscopic), and the doctors know this, so their recommendations were appropriate and the patient was worried over nothing. But, I don't think this means that the same is true for all procedures, and suggesting that people just make peace with it or whatever without knowing what the level is seems wrong. Especially in the case of surgical recovery where the first day or two is usually the worst, and the risks of medication over such a short period are low.
I wouldn't wish for a more serious level of pain on my worst enemy. I do not think it is useful or possible to make peace with, unless you are Buddha himself.