You left out broad interpretation when you quoted me. That changes the meaning of what I wrote and was misleading, IMO.
Your last paragraph is not quite accurate either.
I always ask "where in your opinion does the Constitution authorize...
The question is not asking what the government's rationale is. It is designed to expose a poster's liberal "living, breathing" approach to the Constitution.
Yes, a broad interpretation of the Commerce Clause can have a downside, and does have a downside to those who view it in the strictest sense.
IMO, it has probably run it's course. I believe the last major USSC case which cited the Commerce Clause was struck down; United States v Lopez restored some sanity to the Commerce Clause, and the opinion in the case makes for good reading.