I think the crux of the matter, well for those of a religious bent or otherwise, in succinct terms is

"Why should the Devil have all the best tunes?"

And for the pedants
Though it is widely attested that Booth used this adage, it originates in the 18th century, being attributed to George Whitefield, in The Monthly Review, or, Literary Journal, Vol. 49 (June 1773 - January 1774), p. 430; it has also been reported as a remark made by Rowland Hill, when he arranged an Easter hymn to the tune of "Pretty, Pretty Polly Hopkins, in The Rambler, Vol. 9 (1858), p. 191, as well as being attributed to Charles Wesley, and sometimes his brother John.