"lex orandi, lex credendi - "the rule of prayer is the rule of belief".
What you believe influences how you do church and how you do church influences what you believe. It's not nearly as much as a matter of personal preference as many think.
What you believe worship is and the role of music in it determines what kind of service you'll do/attend.
For example, the CoWo service format of song block, sermon, maybe an altar call/time of decision has it's origins in the Revival meetings of the Second Great Awakening. That Awakening was Arminian, and so they did not believe preaching the Word was enough to convert people, and they used music to get people into the right emotional state for the sermon and to "sit at the anxious bench", make their decision for Christ.
And the contemporary worship music as done by the likes of Hillsong or Chris Tomlim has as it's purpose aiding in seeking a mystical experience, to "enter into God's presence" and the like. This is why CCW has the things like shallow repettive lyrics many hymn proponents complain about.
All of this goes against what Lutherans say about church and worship is.
Even things like how the church is laid out physically reflects what you believe about worship. For example what is front and center in church? The Pastor? The Altar? The musicians? etc.
How many times have you seen a praise band play from a choir loft behind the congregation?
Went to the contemporary worship service this morning...
it was terrible
A lot of Lutheran churches have the later service be contemporary or "blended", and they can be pretty bad.
Remember what I said about worship reflecting what you believe? Lutheranism doesn't have a theology of worship as mysticism, and has a strong tradition of congregational singing, so when you do praise bands in a Lutheran church, while you might see a couple people raising their hands and such and the band will be into it, but by and large the congregation will treat it like a performance to observe.
In my experience Lutheran CoWo services are actually less lively have less congregational participation than an historic hymnal based services. Of course, that's painting with a broad brush.
stress the individual too much
Yes, Contemporary worship is very man-centered. They'll argue it's not based on all the praise and glory they heap on God and that it's all focused on God, but that's the point, Contemporary Worship is about what
you do to/for God, while historic worship is about what God does for you in Word and Sacrament as well as our praise and reaction to that.