g.f.
In 11,000 hours around the world, I understand frequency changes. I also understand that controllers can only clear you for routes and approaches in THEIR airspace. KZLA cannot overrule a SoCal Approach controller and issue an approach clearance. You seem to not understand that procedure.
Call POC tower and they will likely respond, "Say what?" They are a VFR tower.
The SIDs over POM VOR are for KONT. SoCal TRACON controls the airspace over POM for terminal area IFR traffic. POC is a small general aviation airport that happens to have the POM VOR on a hill very close to the airport.
This all reeks of past arguments with a nerd in France who had zero flying time, but lots of pizza eating and MSFS, coupled with extensive reading of aviation directives. He was the ultimate authority over all real pilots on the now defunct IFR Usenet group.