Being licensed under a CC license doesn’t necessarily mean you don’t need attribution. CC0 is a way for creators to waive all copyright rights. The same applies to public domain works. It may not even technically be a “license”. The rest all require credit. That’s what the “BY” part means.
There actually aren’t a lot of licenses. Add all of those licenses and maybe some extra free licenses together and it’s still probably less than some proprietary EULAs or online terms of use page. And they’re standardized. Read them once, start using software with those licenses, and then you only need to check to make sure you recognize every license used.