Yes the issue of aspiration always comes forth. It is due to the neurological degeneration. The timing is not right to keep food or liquid out of the lungs. A body normally does this unconsciously, autonomically.
Usually this is near the end because of the associated pneumonia.
But there is no problem at all with eminent death at that time or organs shutting down.
A simple feeding tube in to the stomach solves the problem completely.
But medical professionals, in general, are resistant to doing that and will not suggest it and will try to have the family opt for the starvation euthanasia you describe.
But this simple feeding tube to the stomach causes them to never need to take anything by mouth ever again. Allows them excellent nutrition and makes them physically more healthy than they have been in years as their Alzheimer’s or other age-related dementia disease progressed.
They can live years quite physically healthy with this simple supportive care.
Our family had no say in the matter as my grandfather was coherent, had a living will and a DNR...he accepted the doctor’s prognosis and made his own choice.
My grandfather’s situation was what it was...not all are the same.
God is in control of all things. Not doctors.