Not for diversions necessarily. Diversion versus expected connection should at least help one’s lawyers… hopefully.
When you're standing at the customs office entering a country, your lawyers are far far FAR away and the people talking to you won't care about them even a little bit.
Whatever will happen with you lawyering and fighting the border officers, will happen after you've been detained.
If you’re flying private customs is a joke. And/or your fixer just calls the local governor/embassy/etc.
Lawyers can get you out of jail, but you need to be pretty rich for your lawyers to prevent going to jail in the first place.