I have nursed terminally ill relative, it was a case where Im sure that they would have chosen to use he assisted measures and would have more comfortable for them. It would have certainly distressed me, but I would have been keen to follow their wishes
They were diagnosed with a terminal illness that had a 4 months average life sentence and they died 11 weeks after the fatal diagnosis and refused palliative care to give them a few more weeks
I do believe in some cases to be able to have assisted dying, with possibly intervention of a court to ensure the person wishing to dye isn't being pressured by anyone - would indeed be kinder.
Death even a good loving death can be traumatic and cruel by the nature of dying, whereas a controlled process would be kinder in the actual process of dying.
Someone rasping for 3 or 4 days for breath is not a pleasant for anyone (I had a friend that this happened to but actually he went on for 5 days)
With strict control to ensure their isn't pressure or guilt to die surely this is not unreasonable to ask? I do mean literally with a few weeks to dye and allowing the person to choose when they are ready - if ever