It would, unfortunately advertising agencies have showcased advertisers that they can hijack focus of an average website visitor with rich graphics irrespective of the context e.g. Say toothpaste ad on a tech blog; And the toothpaste company doesn't care as long as they get a click(even if the conversion is abysmal).

Other side of the story is that the tech blog would find it very hard to get a proper referral link for PC parts they're covering for contextual advertising unless they're of considerable size. Where as getting a banner ad to display what ever it wants is just usually couple of clicks.

As a result, whole Internet is full of rich graphics built by and built for these advertisers making simple text based readable websites an endangered species; Further making the lives of those with accessibility needs miserable.