Understanding that current is a convention because it doesn’t matter if you have positive or negative charge carriers in many applications is not wrong in any w

Understanding that current is a convention because it doesn’t matter if you have positive or negative charge carriers in many applications is not wrong in any way. Given the nature of electric charge (not to mention specific applications like semiconductors) even if you align the direction of conventional current and flow of electrons, it will still be a convention. That’s the cost of having an abstraction for net change in electric charge (which is a useful and insightful abstraction). Don’t believe schools are teaching anything different than this.