People are free to use them. I certainly do not hold back the information if the student wants it. One more thing to think about is not helpful when it comes to making music, especially when other musicians are involved.
It is better to get to the note and get to work placing it with the other musicians, shaping it, etc.
If you are amazing at dividing your attention and can deal with information on the page, from other musicians, the conductor, etc. and still get to your pitches and shape them into something beautiful and or interesting then they may be worth it.
If not, they should be the first to go in terms of streamlining the thought process.