为什么用Ok换行匹配语句被认为是错误的形式？

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In a blog post, Rust contributor withoutboats mentions:

Most of my functions with many return paths terminate with a match statement. Technically, these could be reduced to a single return path by just wrapping the whole match in an Ok, but I don’t know anyone who considers that good form, and I certainly don’t.

一个（有些人为的）例子

坏：

Ok(match response {
    UserResponse(user) => user,
    ItemResponse(item) => item?,
})

更好：

match response {
    UserResponse(user) => Ok(user),
    ItemResponse(item) => Ok(item?),
}

为什么会这样？