While I understand the sentiment of calibrating before important rides, let's not forget that over-calibration can lead to unnecessary stress and wasted time. It's not just about every watt, but also about the rider's peace of mind. If you're constantly fretting about your power meter's accuracy, you're losing focus on the ride itself.
Moreover, not all rides are created equal. A leisurely Sunday spin doesn't require the same precision as a competitive race. It's about finding a balance that works for you, not just blindly following the manual.
And let's not forget, power meters are tools, not the be-all and end-all of cycling. They're there to enhance our ride, not dictate it. So, let's not get too hung up on the numbers. After all, the joy of cycling is in the ride, not the data. ;-)