This is an easy answer. It’s the same reason I don’t work on my own car. I don’t know enough to ask an intelligent question. There are hundreds of things to consider in filing for bankruptcy.
Yes, you can try to figure it out yourself. It’s not a matter of intelligence. Frankly, it’s knowing the proper questions. If you don’t know the questions, you won't know the answers. Having a skilled attorney on your side makes a difference.