Not the ones I have seen. I had women that worked for me that had those done and in a matter of days all they did during meetings was scratch with a pencil. They might be able to wash them but I didn’t know any that did. Their excuse was that they paid too much for them to do anything that might undo them.
That is a separate issue, people choosing to wash their hair or not. Tight braids (as in AA hair) can be washed, and everyone should be clean.