You have stated there are costs, yet you do not show them. I have stated where you can find payments for those “costs” you claim.
So what are the costs? Where are they listed? And how are domestic suppliers hampered by not paying those costs?
The statement about illegal immigration was simply to point out that Government malfeasance with funds is universal; if a port authority cannot manage their charges and or set their fees appropriately then your anger should be directed at the port authority not the shippers.
As a resident and taxpayer in Los Angeles, I am well aware of the costs everytime they issue a new bond for infrastructure, transportation, ports, environmental cleanup, etc. That doesn’t even include the cost of beefing up border crossings, customs, security, etc. That you are unaware of the costs does not mean they don’t exist. Do some research.