I would find that more persuasive if every flight on every commercial airline didn't tell you to turn off electronic devices.. I've never been on a plane where they announced that the electronic shielding was current and robust so we were free to keep our devices on, the indiscriminateness of which is kind of the point.
If half the flights said "you can use electronic devices as this plane has been shielded and is safe", it'd make everyone think a little harder on the other half of flights.
I do wonder what they'll do though when they find that every device they ever test is fine. It's one thing to find that 1 in 20 of devices tested are problematic.... It justifies the precaution. But if none are found problematic it'll seem a more stupid rule for all.