I am not and never have been a JW, so please take my opinions with that in mind. I am also now a 'worldly' atheist.
I have been to a couple of JW 'meetings' - and a couple was all it took to recognise the brainwashing that was going on. Interestingly, at the first one some old dear got the microphone and started mentioning Russell, 'our beloved pastor' but she soon lost the mic. All very different to the spontaneity I was used to.
(A sad side-note. One of my friends here, an 80+ guy, had the privilege of reading out the paragraph in the WTBTS mag at the meeting. He was a really nice guy, and I am friends with his widow. Last year, after having being diagnosed with terminal cancer, he drowned himself in our communal swimming pool. Poor old bugger, I think, after wasting so much of his life devoted to a lie. And the faithful and loving JWs who would rally round the widow? Forget it! It's us 'worldlies' who do that. Rant over.)
I am Welsh, and we have a tradition of singing and music. If you have never heard a Welsh Male Voice Choir, you have missed out. And if you've never heard the festival of 1000 Welsh male voices singing old hymns, you won't understand.
There is a word in Welsh - 'hiraeth' - which means the longing for the homeland. It is inextricably linked with old Welsh hymns. Even if you question the reality of the words, it can get to you.
And, I guess, that's true of much church/chapel music.