What's the excuse for them?
Jeffrey Tucker at NLM has an excellent article, exposing excuses for the "dumbed down liturgy", and how those excuses can (and should) be eliminated.
Let me add this. Jeffrey writes:
Third, we must build for the long term by forming children's choirs, no parish excepted.
Correct! And in doing so, they need to keep away from the trite, dumbed down, banal ditties found primarily in Glory and Praise (all editions, including Young People's Glory and Praise), Gather, Rise Up and Sing, Spirit and Song, Hi God!, and other similar ilk. That's been a big problem for nearly forty years.