Actually, commercial airliners glide surprisingly well and can stay in the air for more like 15 minutes from 30,000 feet without power. If there's a suitable runway within 60 miles or so, loss of all engine power at cruise altitude is eminently survivable. Examples: Air Canada Flight 143 (a 767), TACA Flight 110 (a 737), Hapag-Lloyd Flight 3378 (an A310), and Air Transat Flight 236 (an A330).Probably has something to do with being 30,000 feet in the air in a metal tube with little glide capability and if anything goes wrong it will be about 5 minutes of sheer terror before dying.
All that said, I use citrus/fruit flavored 4mg nicotine gum on airplanes.