real life first, math second. taking tests is a skill that must be learned, especially now with AI faking quite literally everything that can be shown on a screen. (unless your students are learning purely for the joy of it and not for having a chance to get hired anywhere.)
You understand the world actually has difficult problems, right? Like life and death challenges, without video game restarts. You don't get to pause things when it gets hard.
Yes, working under pressure is a skill that should be learned. It's best to learn it on a history exam when nobody is at risk.