Ask HN: Is there a good reason many product docs and blogs lack homepage links?

I seem to come across this a lot. I'll be assessing some product or service and follow a link to the documentation page, only to find there is no obvious way to get back to the actual product page to check pricing, etc. The same thing when I end up on a product's blog.

Here's an example:

https://sourcegraph.com/docs

Where's the link back to https://sourcegraph.com/ ? Is this intentional?