Surely they could just have a system to filter out bad sites?
For example, if I want information about some programming stuff, I only really want
* Wikipedia
* StackExchange
* MDN
* cpp-reference
* whatever official docs
There's absolutely no need to have
* geeksforgeeks
* w3schools
* cyberciti.biz
* random wordpress blogs
This takes all of 5 minutes to code, you could even have a userscript for it.