I feel like, I certainly have to keep you on your toes on how you misinterpret the laws-- Every law/statute has a purpose but that is not what the plaintiffs are saying.
They are only refering to the dictionary meaning of "random" itself. How would you interpret the statute in a case where the word at issue was "such." Are you going to put the same spin as you have?: "because laws have both definte aim and purpose" because "laws have "such". Again dont be putting spins on the rules and interpreting it as you understand. There have been several cases where the meaning of a word in a statute was not define and has several meansings even when the dictionary was used to find the meaning of that word--this where statutory interpretation comes in.
So regardless of the meaning the plaintiffs are using or Dos will use, if the court finds that the word "random" is ambiguous and subject to several meanings the court will engage in judicial interpretation considering the intent and purpose of the statute-- At this point only the meaning that the court will give to "random" will hold and not what the defendants or plaintiffs will say. That is why it is called statutory/judicial interpretation
The bottom line is statutes are not interpretated the way you are interpretating it. I have given you cases just for you to read so you will learn or know how the court reason and interpret statutes when the word in a term is an issue.
The Congressional intent and the purpose of the staute is to give greencard to countries with less immigrants in the U.S. However, Congress did not define the word "random".
DoS might rely on "Chevron deference." This case has two to four issues but you seem to be tackling only one of them. Again, there are other issues-- you cant ignore "detrimental reliance," "standing" etc
For your information the case where "such" was an issue is a real case and not imaginary case. There are even cases where "semi-colon(
" was an issue.