You used the word never.
My parents always used to say they stopped listening to me whenever they heard the words "always" or "never." I'm not bolding this for you, but I did a lot of reading here to find it so I'm bolding it for people who skip posts (I know you don't).
A full symphony is as loud in dB as a machine gun at peak, and as loud as a lawn mower on average.
Classical music was secular in it's day too! It still is, many of the songs handed down through the generations aren't any more about God than our secular music is today. Sure, they might not have used any "naughty words" but some of it is very ungodly, and some of the artists were themselves, very godless.
Who do you think paid the musicians to write music and perform it for them at a time when people had very little disposable income? The rich upper classes who engaged in godless life styles. Were there some very Godly gems among these songs, yes, absolutely. But you're making a broad and sweeping generalization about another form of music while holding another one up on a pedestal.
And there were people who argued that the piano was a terrible idea and harpsichord was the way things should be done because that is the way things were always done - I kid you not. Things change, languages change, music changes. The only constant in all of that is Christ.
Also, classical music was not always composed during a quiet time. It was composed during a time when many people were slaves to tyrants, composed during times of war, and occasionally, composed during times of quiet reflection, but not always. And when played with a full orchestra? It was not quiet, it could not be quiet. You cram 50-100 instruments into an ensemble and the very earth will shake. Played the way the original original composer intended
a full orchestra is loud enough to cause permanent hearing damage.
Just geting into that a bit further, a scholarly article
here shows a peak of 143 decibels. That's within immediate hearing damage territory. It's within striking distance of a rifle going off. And the median? 90 decibels is like a lawn mower.
I do not see how any music that praises God can also be talking about rebellion, unless it's talking about being forgiven for rebellion (as all sin is rebellion). Unless it's secretly about rebellion while not lyrically demonstrating that, but if so that's awfully convoluted.