You have never flown or even seen my PA-28. I have been flying it for 25 years. Which of us do you think is more likely to know about the accuracy and reliabiity of its fuel gauges?
Excellent, I'm genuinely happy for you
Not in a hundred years would I trust an instrument that in most cases was made 40 years ago, oh, and don't forget, calibrated every two years.
What I trust is the visual measurement, the fuel burn logged every flight and monitoring the trend.