On one of the rides in one stage of the Tour de France the riders averaged more than 35 mph for 5 hours. I doubt any non-pro rider is capable of anything like that amount of energy output.
Even on 10 hour rides over 120 miles my caloric needs were met with a pancakes breakfast and snacking on dried fruit and nuts and over a period of a week or longer my weight was the same at the end of the last day as it was at the start of the first day. Most Americans far exceed their caloric requirements and consume too much in the way of processed food carbs and animal protein which shows in the ill health and with life expectancy in decline.
People have far more access with the internet to data but few have the critical thinking needed to process that data and respond appropriately.