As opposed to evidence of a bunch of greedy, undisciplined Fuck-knuckles with no heart and no pride?
In your view, what would "sharing personal struggles to stay mentally sharp" look like? What kind of things do you think they talk about in those 15 minutes?
I'll admit the phrasing is ambiguous, but as I see it, it means one of two things:
1) the players share their personal struggles, which helps them clear their mind and therefore stay mentally sharp
2) the players share the difficulties they have experienced in keeping their mind focused
A report out of Miami disclosing either of these things about McDaniel's practices would... not be received well.
But since the Super Bowl champs did it, it must be super smart!
It's kind of like thinking that since Chiefs players rated their locker room, training staff, nutritionist, and ownership all as Fs, the key to success in this league is to give the players a shitty locker room, terrible training staff, no nutritional guidance, and an owner they hate, which
toughens them up for gameday.