I disagree with this. You can already see a recent example of Canadian consumers avoiding US imports, creating pressure on US companies, and the US government reacting by making moves to curtail the original tarrifs proposal.

Obviously the Canadian boycott was only one component but I believe it did have a meaningful impact.

Kind of agree with you re:plastics. Last time I read about it they could only be recycled once into inferior quality plastic. Ironically in this case I’d suggest voting with your wallet is a solution to the plastic problem since businesses will react to more consumers switching to responsibly packaged products like paper bags for fruit + veg from a local grocers. One of the large supermarket chains in the UK, Waitrose, switched to paper bags due to public pressure in the past few years.