I agree, everyone is different. Some people simply have no desire to say goodbye or to see a loved one in a near-to-death state, instead, preferring the final memories to be of the person as they were when relatively well.
When my dad was gravely ill in hospital and the writing was really on the wall, we had not been to see him but our GP upon hearing the state of play suggested we should go right away "or you will regret it later". His inference was plain.
Unfortunately, my mum now regrets doing the visit, as her enduring and final memory of dad is his being a gaunt shell of a man lying in a hospital bed making pawing gestures at the oxygen mask with skeletal, bruised arms and making vague moaning noises. The bruises were from the fall which fractured his hip which was why he was there in the first place, the repair surgery was followed by a heart attack and pneumonia etc. He was out of things and on morphine and we were assured he was not truly conscious.
It was unbearable and I had to all but carry mum from the ward as she almost fainted at the sight and could not bear to stay. She does say "if only I had had the courage to stay with him" but I think the "goodbye" served no purpose. I had more or less worked out what we were going to see so the shock was not so great for me. The poor duty nurse got very flustered at mum's distress and gave her a hug - and offered the univeral British cure-all, a cup of tea! The consultant was very detached and clinical and I suspect that is how they have to be or they'd have a breakdown.
It also did not help that another patient being admitted to the same fracture ward whilst we were there was also obviously suffering from dementia or delirium and alternating between heart-rending screams and being abusive to the nurses. Luckily mum is hard of hearing so was spared much of that!