If folks only rely on a PHONE for their PRIMARY alarm, and then miss flights/work/etc., that's on them. People should know that an electronic device that does more than be an alarm clock might mess up that feature. Why people don't just spring for a $10 travel clock that works perfectly 100% of the time (save for battery death/changing) is beyond me.
Or why spend hundreds on a phone that doesn't even have working alarm clock. You never travel? You mean a clock radio can't be trusted? What about a digital watch? Get over it.