Many large corporations hire consultants and pay millions to make strategies for them and to get an outsider's perspective. What if you hire the same consultants for start-ups? Well, for starters, start-ups can't cough up enough cash to pay these guys for a day, let alone sign a contract with them. Also the primary focus of such consultants is growth and that is possible only when the base is strong. The usual result is "building - STRONG, but, basement - WEAK". That's why a small change in the market conditions brings down the whole business.
Going for specialised start-up consultant is important for the entrepreneurs who have way too much on their plate. Are you a founder, who is building a business and figuring out how to run it, manage it, grow it, nurture it etc all at the same time? You definitely could use a helping hand from an experienced consultant at that stage.
Taking risk is definitely a part of handling a start-up, but the risk must be calculated and measured. Various aspects of business that give you the edge over others such as competitive analysis, strategic planning, process optimization, industry insights etc will be taken care of by the consultant. This not only ensures that you to take a step in the right direction but also your peace of mind.