* Missing comparison: The sentence lacks a comparison point. It's missing a word or phrase after "as smart" to tell us what you're comparing the person's intelligence to. For example, "I wish you were as smart as I am."
* Incorrect pronoun use: "They" is a plural pronoun, but you're likely referring to a single person.
Here are some ways to correct the sentence:
* "I wish you were as smart as I am." This compares the person's intelligence to your own.
* "I wish you were as smart as [insert name or reference to someone else]." This compares the person's intelligence to another specific person.
* "I wish you were smarter." This is a simpler way to express the same sentiment, without requiring a direct comparison.
Choose the option that best fits the context of what you want to say.