Sorry, I missed this in some other discussion.
Fundamentally, I think you're just making a lot of this up to suit your ideological views.
For example: "Would 9 inches do? Obviously that'd be way more than enough, yet that'd be a violation of CalCode giving them sufficient cause to find and/or shut down your business. Some politician somewhere at some time decided all sinks must be at least 10 inches deep. Why? No good reason"
Do you have any data demonstrating this sink issue? I'm betting no. Having cooked commercially, though, I can tell you a deep sink is absolutely necessary to clean well. Is the numeric measurement possibly a little arbitrary? Sure. Most are, but that's better than just "have a pretty deep sink", because you want to install that sink once. You don't want to rip it out later when an inspector says, "Not deep enough, try again."
The people I've met who work on regulatory issues are smart, sincere, and often really want to make things work for users. That's especially true for business regulation, as business owners have the political clout to complain.
I note also that you're energetically conflating restaurants, prepackaged food facilities, and food trucks. Those are all pretty different businesses.
Another example: "This is all an enormous burden on individuals starting businesses"
I doubt it. I know people who have started restaurants, catering companies, and a premade food company. None of them ever have mention this as a particularly big burden. They complain about all sorts of other things. Staff, customers, competitors, and definitely prices from suppliers and landlords. Never one grumble about safety regulations.
As an aside, the reason that many regulations don't seem "common sense" is generally that some asshole found a way to do something bothersome, so they had to add another regulation. For example, in LA people started to effectively run dodgy used-car lots out of public parking on major streets, inconveniencing both people who wanted to park and merchants who wanted customers to park. Last I heard they were looking at a variety of regulatory solutions, none of which would seem "common sense" unless you know the problem. It's the same deal with building codes; many regulations don't make sense until an expert tells you what's up.
And the same applies with software, really. Look at all the things people have to do to make secure software. Many of the rules make no sense unless you have an attacker in mind.
So given that your basic take seems to be, "I, an internet random, think some regulations I know nothing about are dumb," I guess my answer is, "Ok, buddy. Thanks for sharing."