The idea of corporate worship is that the assembly is united in their purpose, there is an order observed, and the people develop discipline from this orderly worship. Also, people are not machines and that's disgusting that you draw this analogy.

People may distract, even in that situation. Many have their minds elsewhere, some don't want to be there, someone may even be actively disruptive. But corporate worship is not usually contemplative meditation.

I have been in worship sessions where silence is strictly enforced, and there is no master guiding an order of prayer. This adoration is always in a group setting. Hey, I've even used my device sometimes to look up Bible verses. It's not sterile.

But if someone is sitting at home, alone, the best practice is to shut out unnecessary distractions to the extent that it is possible. And your phone obeys its corporate master. A mobile device is not under the control of the user holding it.