Many of the example sentences are too complex and don’t really help with learning the language unless you’ve already mastered intermediate level Japanese (which most people learning kanji have not).
It’s a missed opportunity because the philosophy of WK is supposed to be “things are easier to learn if you break them down into their components”. So you learn radicals first, and you combine them to make kanji. You combine kanji to make vocabs. And the last step is supposed to be: you combine vocabs (using grammar) to create sentences.
But if the sentences are too complex, then they don’t help us understand the vocabs very much. Many times you don’t even know how to read the whole sentence because there’s no audio recording for them. Which is why most WK users ignore the sentences, which means the person who wrote them probably wasted their time.
There was a project to add more example sentences, and also write simpler ones. But it was stopped about a year ago and tucked away in the category of “not a priority”. Which means it will take several more years for the rest of the sentences to be rolled out (if at all).