Here  are two renditions of the old standard Isaac Watts hymn "O That The Lord Would Guide My Ways." This hymn is weak thematically, having no reference to Christ or His work. There is nothing objectionable in the lyrics, and certainly no false doctrine. It's what it lacks that makes it weak.

But the following comparison is not about the content of the hymn.

You will also note that in neither of the two renditions is there an organ.

But it isn't about the use of an organ either.

It's only about the style.

And there is no absolutely no question that style matters.

Here's the first rendition.

And here's the second.