You could then decide not to buy the alcohol. Unless you are severely addicted, you will not die if you don't purchase alcohol.
While should companies tracking us to make more money affect our habits?
Also, you need an ID to buy some OTC medicine and to pick up some prescribed medicine. As well some other cases when ID needs to be presented, but those probably require more than just DOB anyway.
Blood pressure prescriptions, no ID lots of times. OTC meds which are ingredients to make meth, need an ID.
Does it include controlled substances? Sure, I can pick up ibuprofen 800mg with just my name and DOB said verbally, but whatever is on schedule II (US term, but think Adderall) I required to show my ID.