If Trumps Tariffs are going ahead even after we allocated billions into the border along with that fentanyl czar, why bother even keeping those now?

Seems it was a waste of our time and money. If anything, Canada should be asking the USA to increase their own border security as guns and drugs come into Canada at a much larger scale. And why even have a fentanyl czar etc if none of our actions will stop the tariffs? This was never about the border or drugs but Trump said jump and Canada asked How high?