"Instance member cannot be used on type" diagnostic message could be more specific

Motivation

It took me far too long to understand why the compiler was giving me this error (I was quickly trying something a bit less trivial than this example involving async/await, and thought the issue was around the execution context):

@main public struct Scraper
{
    public static func main()
    {
        let data = fetch()     //  Instance member 'fetch' cannot be used on type 'Scraper'
                   ^~~~~
    }
    
    func fetch() -> Data
    {
        return Data()
    }
}

Solution

A more precise wording, something like "Instance method cannot be called from static context", would be much more helpful.