[small voice in the wilderness]

but those providing the cash need to be inspired

The Gospel of the Grace of God isn't inspiring enough? That God sent His only begotten Son, to die for our sins, was buried, and resurrected isn't inspiring enough?

[Desdemona]

Well, here's the thing about Catholic churches and Mass - we engage all the senses. We see, hear, taste, feel and smell (incense) the majesty of Christ. It's very demonstrative. Abstract thought does not inspire or speak to everyone, so the senses are engaged. That way, everyone from the most brilliant to the most simple, from the deaf to the blind can experience it.