Sure, you are right. Laffer curve equivalent for tariffs exists and would have the same impact and consequences. With high enough tariffs there will be no trade.

But even in that scenario it will be the final customer buying a substitute and paying premium for that. If 1m of irrigation tube from China costs $1, how much would it be locally sourced? And farmers need more than 1m, and they can't wait for the trade war to settle.