I have never liked this advice. This is an employee mentality, not an entrepreneur mentality. An employee thinks in terms of salary and hours of work invested

I have never liked this advice. This is an employee mentality, not an entrepreneur mentality. An employee thinks in terms of salary and hours of work invested. An entrepreneur thinks in terms of investments and compounding returns over calendar time rather than hours worked. This makes sense because proper compounding returns will always outrun hours worked in the long run.