Wrong. There is evidence that she can eat and drink.
Absolutely, there are statements that she has been able to eat and drink. Have you determined their veracity, accuracy and bias? Have you determined how often she has been able to this without assistance, or without choking to death on that very same sustenance?
Would you prefer that she be fed, by mouth, and given drink by mouth and die in that attempt?
Could it be, perhaps, that her throat and swallowing reflex went 'south' years (and YEARS) ago, and the next step was natural starvation which the feeding tube precluded?