Private
Probably not, which is why it isn't seen as so very bad.
If I'm quite honest, I won't say that I am offended, more disappointed that I must have made such a poor impression through letting my emotions get the better of me. I really am not the sort of person to need to see a healer. I'm not mad quite well. At home witches aren't treated horrendously the way muggle women are, you know. But even so, madness in the family is an embarrassment, and no woman wishes to be confined to an attic room or sent to some pleasant but terribly secure institution on that account.
If you understand my heartache, and you don't think me weak or cowardly, or hysterical, then I'm afraid I don't quite understand what you think is wrong with me.
Well, one of the most famous wizards capable of it was named Salazar Slytherin. He lived about a thousand years ago, and was one of the founders of the oldest school for magic in Britain - it has changed considerably since then, but it still exists! He was an extremely talented wizard and came up with spells that are still regularly used today.