> Conducting business is a First Amendment right.

I'm a big fan of the First Amendment, but I'm not following your argument here.

The amendment reads: "Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the government for a redress of grievances."

Furthermore, the framers of the Constitution wrote the Commerce Clause, specifically giving Congress the ability to regulate how businesses conduct themselves (albeit in a limited way).

Do you have a court case in mind that provides more insight here?