That is all so true especially in troubleshooting where a novice may take all day to find something make a days wages and a seasoned electrician can find it in five minutes make a few dollars then the customer may say it didn't take you that long the price should not be that much not realizing that they actually saved a bundle.
"Would you rather pay me $100/hour and be done in an hour, or would you rather pay someone else $50/hour and they take all day?"