Learning to manage speaking on a topic without much warning is a valuable skill that can only be achieved with practice.
The suggestions for 1 minute orals come with accompanying mini mark sheets. These can be copied and cut up and I have always chosen 2 or 3 students in the class to mark each oral. The students learn a great deal when they compare the marks they awarded to the ones the teacher awarded. There is a slide of the mark sheet which can be used to talk the process through with the students.
Even if they don’t write much and they spend most of their time in a digital world, they are still going to need to speak and communicate and constant practice, without the pressure of summative assessment, is the best way to prepare them.