Nobody goes to work to do a bad job.
There is very little evidence that we give a hoot about profit.
One cannot be successful on visible figures alone ... the most important figures that one needs for management are unknown or unknowable, but successful management must nevertheless take account of them.
A leader knows who is outside of the system and needs special help.
Experience by itself teaches nothing.
It is a mistake to assume that if everybody does his job, it will be all right. The whole system may be in trouble.