While I agree with crote's reply that this isn't a limitation at all for a professional, I'm surprised to hear your opinion. Of all the libraries that come with tools, I find KiCad's to be the highest quality with regard to footprints (in addition to having a ton of them available). Perhaps the symbol libraries are more limited, but that being said, I've never found a mistake in KiCad's library. I've definitely found mistakes in the built-in Altium libs. To be fair, Altium started getting much better after their acquisition of Octopart, and it started to be easier to find things through the built-in search.