I thought a second opinion for big life affecting things is just standard practice.
A friend of mine was diagnosed with leukaemia, and the doctor literally told her - get your affairs in order, you got 6months to live, tops.
She spend a day in a daze not knowing what to do, and her parents were like - get a second opinion.
That one turned out negative. The original doctor was like - ah sorry, my bad.
Had a doctor take a biopsy, said we need to wait for the test results, but should already start planning for cancer treatment.
Results come back: Just some blood under the skin.