What case is there when you want to find a package in NPM, and information about that package, using Google? If you want information about the package then it's find if the NPM package page is missing from the results - so long as you're getting the package's homepage or git repo then that's plenty. From there you can get to it's NPM page. If you know the package you're looking for, or if you know what you want to do, then searching NPM itself alone is fine.
Essentially, there is no overlap in the Venn diagram of "searching for a package" and "searching for information about a package". You want one or the other, not a results page with links to both.
If people realized this about their searches more then Google could fix a lot of spam problems.