Is societal change possible?

When Covid-19 hit the world.
Most are wearing masks,
those who don't look weird and even asked to wear it.
It was a massive behavior change in society
Because lives is at stake.

We don't see any immediate consequences of unhealthy behavior,
if one sip of cigarette corrode your lungs makes you can't breathe again,
if one bad sleep put you into dream state that you never wakes up again,
if one hot dog spoil your appetite you can't taste for food again,
if one day of sedentary makes your muscles atrophy you can't get out of bed again,
it's the fear of deadly consequences of atomic bomb that ended World War II and lead to peace.

Unhealthy behavior light up your reward center of your brain,
leading to addiction, craving for more, form a viscous cycle,
It get more interesting when everyone else is doing it,
making the unhealthy behavior seems normal,
then we get normal obesity, normal diabetes, normal heart attack, normal cancer,
those sleep at 9PM, exercise everyday, eating whole foods become WEIRDO.