Example might be a church that regularly hires a full orchestra to play Handel’s Messiah for an annual Christmas service. The quality and beauty of the production pleases believers and unbelievers alike. Believers and unbelievers from the community flood the sanctuary every year as a result.
Besides the fact that it's all
unauthorized in the first place, if we should do things because "believers and unbelievers alike [are pleased by it,]" then it might as well be thrown away. Worship is first, foremost, and supremely to the Triune God Who
alone is worthy of worship. His people
might benefit from it, but that is never the goal, never the directive, and never the end in mind. Worship is not for the worshipers, it is for the Lord God of the Scriptures. This is why we should do it the way He commanded and not the way we think He'd like it. Inviting unbelievers to church is far cry different from hiring them to take part in "worship leading," whatever that is.