It's a bit too simplistic; coffee doesn't tolerate the overnight lows that you get outside the tropics and only grows between 25°N to 30°S. You could in theory grow it indoors with artificial lighting like marijuana, but that's really expensive.

It takes years and years to establish a reliable farm. Climate change is happening faster and more unpredictably.

Also, it's not just temperature/latitude that plants rely on, it's soil, elevation, humidity, and sunlight. Those are really hard to change.

On top of the temperature thing silence mentioned, moving coffee north would push other crops further north and cause a chain of issues