The wordlist definitely isn't perfect, and obviously each person has their own vocabulary, but it still is a key. It's something the creator mentions, if on your first play you run into a stupid word, you probably won't come back the next day. And the fact that the current word list is 1/th the total word count goes to show how many words are ridiculous.
AFAIK his partner actually sifted through all 13k word list and categorized all of them into 3-4 buckets, which is what lead to the final 2.5k answer list.