As long as the device is safe, yes. As long as a device is statistically safer than a human, yes. Would I let 20 kids sit in a room for two hours unsupervised?

As long as the device is safe, yes. As long as a device is statistically safer than a human, yes. Would I let 20 kids sit in a room for two hours unsupervised? No. Should a school bus full of kids be supervised by someone who is supposed to be driving? No. Should the school bus driver be sending texts while driving, and while supervising 30 kids? No.