The purpose of our government is to secure our rights. The right to life and liberty being primary amongst those rights.
Ah! But that wasn’t quite what you said.
You said and I quote “The Federal Government clearly does not have the enumerated powers to regulate drugs or sexual activity.
Neither promoting morals nor raising revenue (outside of supporting enumerated powers of Government) are legitimate reasons for legislation”.
Anti murder laws are a form of promoting morals. As are anti theft laws.
Now, if you are arguing from the US Constitution, that is a different argument than what you stated above. For the Constitution is rather explicitly about morals (Rights) and about raising revenue (taxes and tariffs).
The idea that there are “inalienable rights” is an explicit moral statement. It was also quite radical for the time, and hence the need to have them spelled out in the first ten amendments.