It’s extremely expensive to grow bananas’s in Canada, so the correct response is to import them not add a huge subsidy. The point is to encourage domestic production, but not to the point of stupidity.

Further, unlike a direct subsidy it’s adding tax revenue.

Not the person you're asking, but I could see doing it to "internalize" the risk of rare events like what we're seeing right now. Basically it applies an incentive towards regionalization over globalization, that can make the system more resilient to distant events.

grossly disadvantaged industries = industries labeled as grossly disadvantaged = industries that managed to talk politicians in to giving them a huge advantage