Whirlybird - My point (as I'm sure you are well aware) was to do with your blase, 'anyway can make a slip-up' comments
Can anyone here say they've never made a mistake?
No - but when it comes to fuel calculation, yes! People who have are not 'foolish', they are criminally negligent.
BTW, if someone has told you that the fuel guages on a R22 are always accurate, then no problem! And checking the fuel lights before each flight - well then there's no way they can fail during flight! Anyway, as you said, 5 minutes is enough to land a helicopter. However, I presume that one day you'd like to travel more than 5 minutes from the airfield? Over water say, or forests, or indeed, people's houses.