Sort of... The federal government passed the National Minimum Drinking Age Act[1], showing they did care. Although they don't directly enforce drinking age mins, the carrot and the stick approach was used.
I think this is a frame of reference issue. The I buy beer at whole foods, someone checks my ID and won't sell it to me if I don't have one. If I vote via mail in ballot, I sign my name on a sheet of paper that arrives to an unsecured mailbox. Whatever the law that applies, as an end user, beer seems to be a more restricted product.