Too many doctors seem to be of the opinion they know best and the patient should just do as they say - even if they are correct technically it is not their life that is on the line. The patient is always right.
As a general rule delaying treatment is almost always the best option. I am glad you avoided an unneeded root canal.
The reason this is considered optimum is that a doctor hitting 0% NAR (which you might naively assume is best) is most likely being overly conservative and missing some genuine cases of appendicitis, which as we all know can be life threatening if left untreated.
There are potent tumor inhibitors like CBD that aren't accepted by most of the medical field, thus patients too (high trust in the doctors). They can alleviate symptoms and slow down metastasis (some academics have seen regression even). This gives time to plan for the rest. Instead you're sent home to die thinking it's hopeless. I guess it's better than dying at hospital, or being cut into pieces by resections... but it's far from acceptable IMO.
No he is not.