It's not terrible advice, it's the same advice you will hear from many lawyers. If a cop pulls you over because you were blatantly speeding - saying nothing, or

It's not terrible advice, it's the same advice you will hear from many lawyers. If a cop pulls you over because you were blatantly speeding - saying nothing, or admitting to it and apologising, are both reasonable things to do. Never talking to police is a safer blanket decision, but you can have some grey area.