#1 self-perpetuating thing stylists say over and over: "Here, this silicone-heavy product will help give your hair some shine and hide how dry/damaged it is."
Should never be said:
Oh, your hair straightens so easily, you could do it at home!
But really, curly hair is a blessing which can feel like a curse if you don't know how to handle it. Whatever a stylist says it should be positive and helpful. If someone with curls wants to straighten, a suggestion of how to make curls work and how to keep heat treatment from damaging hair are both appropriate. But even as someone who is totally pro-curls, I find "you should NEVER straighten your hair!" said to someone who asked to have her hair straightened as offensive as "you really should try straightening your hair!" would be if it were said to me.
A stylist SHOULD ask "do you ever straighten your hair?" though, as a perfect curly cut should be finished off on dry hair, and can look uneven and awkward on straightened hair if you do like to straighten.
The pews never miss a sermon but that doesn't get them one step closer to Heaven.
But at least the pews never attend yoga!