I am not in your position, having had treatment in 2018 which seems to have been successful.
As a general rule people who can not be cured are likely to end up on HT for life, and life averages at about 5 years, but can be as short as six months and can be eighteen plus years and counting. Most people have minor side effects from HT, but some people find it unbearable.
It seems for you they have not found cancer over many years, though with a PSA of 182 it is hard to believe you don't have cancer.
I can well understand you not wanting to continue this never ending search to find your cancer, and I think a bury your head in the sand attitude is quite reasonable in your situation. I don't think there is much point in you going on HT until you have some proof you have prostate cancer, or some symptoms you can ascribe to prostate cancer.
You know you are going to die of something at some time, but it could be heart disease, prostate cancer, getting run over by a bus. Obviously you need the oncologists advice, but maybe the best option is wait for some symptoms and start HT then.