We have a site with a high volume of traffic, but a single page accounts for about 90% of the visits from Google organic search (our primary source of traffic). The site has several hundred pages in total, however, the page in question is pretty far off topic from the primary topics/ goals of the site. It just happens to be a very old page with a lot of great content that Google loves.
Here's the issue. The other pages on the site (the one's that actually matter to the business) are getting less traffic over time. It seems that Google may have become confused about what the business really does, and is delivering more off-topic traffic, and less on-topic traffic over time.
Question: Should we kill the page that's attracting off-topic traffic to eliminate the risk of Google being confused? What are the potential downsides to killing it?