Why should I work with an attorney to form my business as opposed to using an online service?

The old adage "you can pay me now, or you can pay me later" definitely applies to this question. Working with a professional, an attorney that knows the ropes and can get you started on your way correctly, is far better than doing it yourself with an online service. You have continuity of the relationship with an existing attorney that you will never have with an online service.