It's an interesting dilemma for me and I was reaching out here for a range of opinions, not a definite answer. No one is going to have a definite answer, as each jurisdiction is tasked to interpreting and applying the code for their specific conditions. Yes, I'm in California, but it's a big state both in terms of population and geography. Where I'm at is on the opposite end of the state from where ICE is. He's probably a 12-14 hour drive. How many other states can you drive a relatively straight line for 14 hours and not cross a border? Texas, Alaska, Florida?
Anyways, it's very different up here and a LOT of stuff is ignored in neighboring jurisdictions... I can say with conviction that no "ordinary" single family home built here has ever been required to have more than 2500 psi. If this hadn't come to my attention I would have never even thought of it. On the flip side, in the six or so years I've been inspecting, I've only seen one purely prescriptive design, and they called out 2500 psi, and no one questioned it.
The question was brought to me and I'm trying to provide the best answer I can, and like so much of code it's not exactly clear. Thanks for weighing in with your opinions, it's much appreciated.