Feeding tubes are not machines, they've been used since the 1800's, they are less burdensome than drinking through a straw, and they are about as high-tech as contact lenses. Food and water --- for a person who can still metabolize nutrition --- are just aspects of ordinary care, like keeping the patient clean and comfortable.
Causing a helpless person to die of hunger and thirst is not "letting life end when God says so." It's criminal neglect and it's painful and cruel.
And if you've been paying attention to God, you might note that He says it is obligatory to "feed the hungry" and "give drink to the thirsty." (Matthew 25)
I wish feeding tube manufacturers would engage in a public relations campaign. Feeding tubes are not "machines". I've seen infant feeding tubes. They are like small backpacks and a small clear tube. The babies and children who need them are mobile and weren't in any distress.
I think it's ashame we have to step in to defend feeding tubes. Where are the manufacturers? They aren't explaining their product line well enough.