That 'caveat' is the actual science. So it's a pretty big deal.
Numerous peer reviewed articles published in reputable journals have reported that there are advantages to banning cell phones in the classroom, yet you as the sole arbiter of "actual science" declare otherwise.
The point of science is to provide better information for us to make decisions with, not to prevent us from making decisions at all until it's done
If we waited for science to settle and provide the best information possible, we would never get anything done