People like you are a hazard on the road. Driver fatigue is a real thing - and saying you can go 8 hours without stopping isn't a testament to how awesome you are - it's a testament to how little you care about others sharing the road with you.
Some people think they have super-human reflexes, or are immune to fatigue, or have trained themselves to task with a phone and driving. Most of these people are wrong. Chances are, you are just an ordinary driver - and there is nothing wrong with that.
I'm more than willing to admit I'm an average driver - and so I will take breaks, or forgo using the phone, or drive slower to compensate for that. Yes, sometimes I do drive poorly (sleep deprived, stressed, or in a rush) - but I'm never going to claim I can go 8 hours without a break. That's going a bit far.