Originally Posted by
CVividasku
Nothing wrong with pushing several buttons at once in itself.
True. There is also nothing wrong with landing Vref+15kts on a 4km dry/no wind runway. But you will get a remark in training.
Teaching in training is about creating good habits to good standards. Every trainer knows: give a finger, lose an arm. Before you know it, they are pushing 4 buttons at the same time. One at a time, and check the result of your action.