To have a medium and an audience so vast, and not to use them to the best of your ability... should be a crime
A designer is an artist. He has to find the best way to present your website to the public using colour, layout, images and fonts.
The design means something.
Each website should be unique the same way each business is unique. The point of a website is to showcase what makes your business special, not what makes it ordinary.
Most agencies do not use designers for their websites
They use people who adjust pre-existent templates to your content.The individuality is gone, and your brand is the one that suffers.
It can make a splash!