They didn't say it requires saints and/or geniuses to follow the advice in TFA, they said that people will often twist good advice in bad directions because they have ulterior motives. This is true regardless of how difficult actually implementing the advice would be.
The advice in TFA basically boils down to "don't pendulum, try to find a good middle ground between extremes", which shouldn't require either a saint or a genius.
The advice in TFA basically boils down to "don't pendulum, try to find a good middle ground between extremes", which shouldn't require either a saint or a genius.