An outfitter in Alaska once told me his least favorite clients are military. Rather than turn around, they try and "tough it out." They are all toughness and that leads to poor decision making, especially in the cold, that often costs lives.Mentally Touch
Yes, the Seals program is to determine the individual are mentally tough enough to endure and not give up.
Some indivuals may be more physically fit. However, unable to grind it out.Goggins has stated quite a few times that his approach is to overcome mental barriers and reach goals rather than systematic performance training. ...you can train despite fatigue, injury, wear and tear, etc
Chroinic OverTraining
Training with this approach ensure chronic fatigue, ensure wear and tear, tirdness, etc.
Periodization Training Cycles
A well forumlated Periodization Training Cycle will include pushing youself to the limit or close to it at time, into OverReaching.
To Reiterate, following it with a New Training Cycle that something light and easly, allows the body to adapt and become stronger.
OverReaching develops some ability to learn to gut it out.
Good Point
Into Thin Air
This book examines how "Eight climbers die on Mount Everest during a storm on May 10, 1996. It was the worst loss of life ever on the mountain on a single day.:
One of the lesser conditioned memeber of the climb was Dr Beck Weathers. Weather survived due to his mental toughness and deteremination, while other fitter individual gave up and died.
DNA
Mental Toughness and dive is essential in some individual DNA.
Dr Jason Curtis
In 2012 at the Albuuquerque Strength Training Clinic (sanction the National Strength and Conditioning Association), Dr Jason Curtis' presentation, post on this forum, examimed "Winning The Challenge" Weight Loss Contest hosted by Define Gym, a local gym with multiple locations.
Curtis did a psychological profile of three goups.
Curtis determined the most successful individual were self driven; essentially it was in their DNA.
With that said, some individual can develop mental touchness over time.
Other will stop when the going get tough.
CrossFit
Overall, the metality of CrossFit of constantly pushing to failure is determental. It is more about determining who is the toughest rather than eliciting effective training results.
Generally, studies have shown that Crossfit people are more likely to get injured than in other sports. Overall, the injury rate is about 20%. https://sportdoctorlondon.com/crossfit-injuries/
Being tough is great... some folks need to "toughen up" ... others need to "wise up."