The false promise of "secular" therapy is that it will give you the view from nowhere. A scientific, independent perspective untainted by beliefs or bias. Unfortunately, anyone who has met a person knows that this kind of independence doesn't and can't exist in real life. So a "secular" therapist will still have all the same individual bias and beliefs, but they won't have them articulated and enumerated in a creed or a body which can be scrutinised. It will all be pushed down into the subconscious, with just as much impact but far less accountability and visibility.