I have known several people who died before they reached 50. I have known a number of others who retired early because the doctor (correctly) said their cancer is incurable - they had 9 months to enjoy all that savings. I knew someone who planed a great retirement, and her health declined such that even though she lived to 76 (just under average) her entire retirement was spent making regular trips to the hospital and even when not in the hospital her pain was such that she couldn't enjoy anything in life (her husband had a few years to enjoy the savings after she died).

If you know for sure exactly how long you will live and how good your quality of life will be then the advice to max out early is probably good. However you don't know - average advice is good for average but if you are an outlier it isn't useful and you don't know. As such you need to compromise and part of that means you enjoy a little more now when you know you can, as opposed to a lot more in the future if you live that long. Exactly what they means is personal of course, but this conflict is why I would suggest a more modest retirement.