When I was young, our priest had a sermon he recycled every year. The key point of that sermon was that we should be attentive when we pray. After all, if one programmed a robot to recite prayers, it would be meaningless.
Seems pretty straightforward to me. God is not some machine who can be fooled by machine repetitions. He's a person who listens to our personal messages.
It is not, apparently, straightforward to everyone. According to Marketplace, a show broadcast on National Public Radio, there's a website (not named) that will pray for you for the low, low price of $4.95 a month. For that sum, the text of your prayer (all denominations and faiths welcome) will be run through a voice synthesizer three times per day.
Yeah. God will really be moved by that.