This method is a little bit more complicated than you describe it. I’m also not sure how easy it is to scale.
You still need to destroy parts of the beehive, let all the bees hunger for a few days and disinfectant the parts of the beehive you want to reuse. I don’t know if all of this is possible with that many beehives mentioned in the post.
At the end hygiene (torching unused hives and frames) is the first thing everybody can do to prevent such situation.
Not the OP, but in my country, instead of destroying everything, we lockdown everything within a 2km radius and only kill the colonies that actually have the disease. Sometimes it means the entire apiary, sometimes only a few hives. There doesn't seem to be a need to bomb the whole area :-).
The second thing is that if it is all about "efficiency", maybe the producer should not complain about the limitations of their "more productive" way. It feels a bit hypocritical to say "we do it this way because it is more profitable, but when we have a loss of productivity that is fundamentally related to the way we operate, then we believe the State should pay for it".
i'v thought about honey making as a hobby once I finish university, but I am unsure if I am allergic to stings....and am not exactly keen to find out.
It means "American foulbrood", it is a disease: https://en.wikipedia.org/wiki/American_foulbrood
> but I am unsure if I am allergic to stings
One can "become" allergic anytime, after many stings. You generally would not know before you make an allergic reaction, which is why beekeepers have to be "ready" to make one (as in, know how to react properly). I know beekeepers who keep practicing after they become allergic, some stop.
> once I finish university
I realised only after I graduated that my university had a beekeeping association... Are you sure yours doesn't? :-)