[Rinzler89]

>. Working out, brushing teeth regularly, eating healthy, etc, are not enjoyable in the short-term, and people with higher IQ / more successful tend to be able to better control their impulses and have longer-term vision.

That's not as easy as that.

Having dealt in your formative childhood years with poor health due to poor medical care where doctors just pump you with antibiotics and fuck you up, poor dentists and orthodontists who make your conditions worse, living in loud polluted neighborhoods where you're not getting quality air and sleep, not getting proper nutrition as a kid due to poverty, getting bullied and harassed every day leading to constant stress and anxiety, etc, all these impact your looks from your early life and are not in your direct control as you make it be, and won't easily get remedied no matter how much you brush your teeth, eat well and work out in adulthood.