One presumes you have written to the aircraft manufacturer of your opinions on the use of reverse thrust and recommended to Boeing they change their procedures?
There's always one! It's why I thought whether I should answer at all, but I mistakenly went ahead. I shouldn't have bovvered! The FCTM may state Boeing's recommended operation. This may be amended by operator or airport requirements. Most airports I go to require reverse to be limited to idle for noise and nuisance reasons.