Just don't be an ass.
The ad is basically just a legal, or departmental requirement.
That paraphrase might be an accurate representation of what you said, or it might be a gross bastardization that slaughters your professional reputation.
If you make gorgeous websites, and I'm super excited about you making my gorgeous website, and it turns out that you don't do websites for people in my line of work? At this point, our organization really needs someone with more project management experience.
That way you can learn from your mistakes and increase your chances of getting the next job you apply for.
False kindness just gives people false hope.