I am fine with you saying what you want. Just when it comes to actual laws, let us all keep it reasonable and not go overboard one way or the other.
Many laws and regulations are arbitrary, based on a consensus of ... somebody.
Look at building codes as an example. Why is the maximum allowable distance to an exit door in an office 100 feet? So 99 feet is "safe" but 100'-6" isn't "safe"? Or stairs -- maximum riser height is 7 inches. It used to be 8 inches until a few years ago, now it's 7. So 7-1/4 inch risers aren't "safe"?
Or speed limits. Why is the speed limit on a certain highway 65 MPH rather than 55 or 60 or 70? Somebody had to make a call and say "this one's good for 65."
The same applies to drunk driving. It's not based on how many drinks you have, or what's in the drinks. There is real evidence that alcohol in the blood system impairs perception, reflexes, and motor skills. A large person with more blood and more body mass can absorb more alcohol before reaching any set limit than a skinny, small person can. So what blood/alcohol limit is "safe" and what's "unsafe"? It's an arbitray decision, a consensus of somebodies who try to balance reasonable safety against unreasonable intrusion into people's lives. The consensus in just about every jurisdiction in the U.S. is .08 percent. They could have settled on .05%, or they might have settled on .10%. They didn't. We have what we have. Them's the rules, and I have no sympathy whatsoever for anyone who isn't willing to conduct himself/herself within those rules.
Society is a compact. In a civilized society, people agree that some rules are necessary and that everyone should conduct themselves in accordance with the rules. If everyone starts ignoring the rules and making their own (or not), we no longer have a society -- we have anarchy.