Do you think that not having enough sleep can really destroy you?!!

Absolutely...... plenty of studies done on the damages of sleep deprivation.

It affects both your mental and physical health so yes

Yes. Your physical and mental health both go down the tubes.

Too much and too little.

There's ample evidence for it.

Oh yeah !

Yes

Ask a parent, they will tell you the harsh realities of life.

Dude like real talk
If my wife doesn't get exactly 8:00 of sleep or more she cannot function.

If it's 7:59, death
8:00, all good

It can. It can seriously affect one's health, both physically and emotionally.