Did you check dollar yen post 2008? Yet many Japanese companies still turned a healthy profit. I strongly believe the number one aspect of a solid and long term profitable business is a high quality, durable, and well designed product. Take a look what kind of cars Audi, Porsche, BMW, and Mercedes are pumping out year after year. The US can put up as many tariffs they want and the Euro can go down or up and yet all the above car makers will make healthy profits. On the contrary, you can save and rescue Ford and GM as many times as you want and yet they make shit products (mostly) and will struggle time and again. It's the product that is key not the exchange rate or other macro factors.
Didn't work as you describe in the early 90's when Bush enacted a Luxury Tax. Im sure the existing boat manufacturers remember. And all the luxury import car mfgs, well, AFTER experiencing significant sales drops, they contributed heavily to various PACs and politicians, and stepped up lobbyist actions. Additionally luxury auto mfgs were logically forced to offer rebates and incentives SPECIFICALLY to offset the luxury tax. Clinton ultimately repealed the tax.