Branding and design are like two lines of a railway track. Go ahead with one and your business is bound to derail, no matter how much steam your engine had.
Your business needs branding and identity design to dissociate itself from competitors. If your customers are associating you with your competitors, you can close your business and work for them. That’ll earn you better.
Marketing and branding help you have a distinct identity that makes your customers remember you. If you are willing to have such a presence, you ought to have a branding and design agency.
If you are still dubious if you need graphic design branding, here’s your definite fate –
Your business couldn’t stand out because you couldn’t take a stand.