Delicate Doesn’t Work
Corporate identity design is different from every other area of graphic design in that the end product must work in a wide variety of circumstances, be readable even at small sizes and be reproduced in every conceivable medium. For that reason, graphic approaches that might be appropriate in other design situations may not work in identity design. Thin type can be elegant and works well in many sitiuations, but it is a poor choice for identity design.
A company’s identity will be featured on signs, meaning they will be viewed at a distance. Visual elements that don’t have a certain minimum of mass are just not as visible as those that do have mass. There’s no getting away from it.
Adapted from Logo Design Theory: How Branding Design Really Works