Yes indeed I have gained a lot out of playing scales and etudes.
They are all different and I find it hard to tell what flute suits me best.
Never just run through a study because you happen to be familiar with it, but use it to see what you can get from it on this new day which has been granted you.
You can sightread better if you know your scales and arpeggios.
I think it is most important for a teacher to play the pieces and studies that are being played by the student.
By the time I got to the Paris Conservatoire I was very good at the scales and arpeggios.