The US drinking age is lowered to 18

Because the legal drinking age is 21, underage
college students consume alcohol unsupervised
in spaces where binge drinking occurs, such as house
parties.

Regulated environments would be a much more safe & responsible place to consume alcohol.

"Alcohol could become a more integral part of American culture, making young adults less prone to drink excessively as an act of rebellion towards the currently implemented law."

Alcohol consumption may not be as much as a necessity in the later adult age if regulated from a younger age.

"young adult brain’s frontal lobes, essential for functions such as emotional regulation, planning, and organization."

potential for chronic problems such as greater vulnerability to addiction

A lot of underaged drinkers will not
seek medical attention no matter how severe
their injuries may be because of worries of getting in trouble.

Going back to being in a safe environment, these accidents would be reduced in a safe drinking environment.

You are able to vote

Join the military

Be prosecuted as an adult

Therefore you should also be able to make decisions
regarding your alcohol consumption.

Can't adopt a child until age 21

Can't run for President until age 35

Can't rent a car until age 25

Drinking hold that same level of responsibility.