People who die of flu or smoking usually have access to health care and proper medication, their families can sit with them while they pass on. actually that generally only happens when the death is expected and treatments are withdrawn. From my own experience:
When I had the flu and was unable to breathe I called an ambulance and by the time they arrived I was collapsed on the kitchen floor. Alone. Nearly died in the ambulance and again in the hospital. Family didn’t arrive until after I was stable and on all treatments.
When I went into cardiac shock my family were there. The crash team were called and they were asked to leave so I was to all intents and purposes alone when I was defibrilated and then wheeled down to intensive care. They weren’t allowed in until I had been at least partially stabilised.
When I had a cardiac arrest it happened after the family had gone home. I felt unwell, rang the buzzer and my heart rate dropped. Was given compressions to try to stop my heart from beating, a process which I was awake for, oh, and alone, and terrified. Having chest compressions while conscious is a deeply traumatic experience. My heart did stop and CPR continued And they were able to start my heart again. Family were called during this process and when they arrived I was down having a temp pacemaker fitted. They had to wait until they knew it had worked before they were allowed to see me.
On all occasions none of my family would have been able to be there while I died.
Sometimes death can be managed e.g. if a ventilator is withdrawn to allow the patient to die naturally in which case the family can sit with them. But for the most part it cannot.