My point is that it is not a strong argument to say that a design used in a film is a good design and/or a safe design because a fictional agency that exists within that film would have vetted it in advance.
By that logic, Kirk and Spock could be flying around in a giant basketball and using sombreros for communicators. Those must be good designs and ideas, because Starfleet wouldn't have chosen them for use in their organization otherwise.
Right, but that's completely disregarding the setting of the show and Universe.
Which we are not by suggesting the weapons would have been tested.
Here we are on a board with dozens of threads and topics about why
the Federation would build a Starbase with doors instead of forcefields etc etc...
And we're not supposed to assume the Federation would have tested
a Phaser design without smartass remarks about Bananas and Basketballs...