Your logo is you or your business' first point of contact with the outside world. If people connect with your branding, the likelihood is they'll be more open to whatever it is offering them. Great logo design requires a complex mixture of design skills, creative theory and skillful application. 

Any designer worth their salt can create a fit-for-purpose logo, but truly mastering all aspects of the craft takes time. Of course, logo design is just one small subset of branding, but the logo or brand mark remains the centerpiece of most branding schemes.

And we all know that it's often the part of a new identity that is most picked apart by the public.