I can drive a car but I guarantee you no NASCAR team would want me behind the wheel. If I can drive safely and get from point A to point B, why shouldn't I be able to drive for a team?
Easy answer - because it's pretty much guaranteed that I would wreck, and 100% guaranteed that I would come in last if I could even finish. Plus, who in the heck would want to watch me race (other than for the laughs)?
Similarly, did you know that elements of your website can not only be wrecking your chances for good search engine ranking but can also be driving visitors away?
It's so easy now to assemble a website that a majority of “web designers” aren't actually that; they're just people who know how to assemble content in a website.
I want to emphasize that I'm not at all against tools that allow you to have a nice looking site on the cheap.
We regularly advise small clients that they don't need our custom services and point them to services like Wix and Blogger. The last thing we want is for you to spend money that would be better spent elsewhere.
What I'm against is when you pay for services that may look nice, but the behind-the-scenes stuff may be killing you. You've essentially paid someone to hurt your website's chances of helping you.