Cost is not the only factor voters considered, bringing manufacturing jobs and expertise back to US is a big part of the tariff push. If cost were the only factor everyone would buy the cheapest crap off temu or amazon. People are willing to pay a premium for the hope of bringing manufacturing back and reducing reliance on foreign sources.
People that favor tariffs, want to bring manufacturing capabilities back to the US, in the hopes of creating jobs, and increasing national security by minimizing dependence on foreign governments for critical capabilities. This is legitimate cost benefit analysis not bellyfeel. People are aware of the increased cost associated with it.