The legal U.S. drinking age is lowered to 18

Safer consumption

They will get to college and be unsupervised without knowing how alcohol affects them

Less prone to drink in excess

Less alcohol related accidents among underage drinker

Gets rid of "Thrill Drinking"

Drinking for the thrill of getting caught

Decreased DUI rates in other countries that have drinking age at 18

https://info.umkc.edu/unews/lower-drinking-age-could-mean-safer-consumption/#:~:text=Lowering%20the%20drinking%20age%20to%2018%20would%20allow,where%20binge%20drinking%20and%20other%20drug%20use%20occurs.

"Lowering drinking age could mean safer consumption"

https://apecsec.org/lowering-the-drinking-age-to-18-pros-and-cons/#:~:text=3%20Cons%20of%20Lowering%20the%20Drinking%20Age%20to,making%20skill.%20...%203%20Easier%20Access%20To%20Liquor

"Lowering the Drinking Age to 18 Pros and Cons"

https://drinkingage.procon.org/

"Should the Drinking Age Be Lowered from 21 to a Younger Age?"

Kids in high school can drink legally

This means younger people would get more access to alcohol

Still not fully developed

Still growing and developing

Impairs their decision making skills

Higher risk of making more unsafe settings

Unsafe sex

Impaired thinking

Heightened emotions (more fights)

If they are old enough to vote, use to be able to buy tobacco but that has since been raised to 21, and can enlist in the military, they should be able to buy alcohol.

Once you turn 18, you are legally an adult and recognized as an adult by law.

Teens will drink reguardless, they should at least know how to be safe with it.