W3C Validation - is it anal retentive?

In the last 4 years, not once have I coded an entire site from start to finish by myself. Unless you are the type of person who enjoys creating circular shapes and calling them "a wheel", I'd advise there is a smarter way to work.
And that is, to use a CMS program to provide at least the framework and functionality of your website.
My default position for any new site is to look at how I could build it using WordPress (and switch to something like Drupal or an eComm system like PrestaShop if WP is not suitable).
By using WordPress I can quickly download and install half a dozen plugins that provide all the functionality I need. To code the same from scratch would take days if not weeks of wasted time.
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Website Redesign
Web Redesign