Core decks vs extensive reading

I guess I'll start hitting easy very often from the start then and perhaps suspend the no-brainers.

By the way, I have this 10k deck: https://ankiweb.net/shared/info/953269262
It's a pretty neat looking version of core 10k. I guess it's a safe bet that the first 2k words are all part of core 2k, right?

By the way, you say doing core 2k is good enough for anime, but is that really enough to get started with visual novels? I thought I'd need at least 6k words to get by somewhat comfortably.