Biologists routinely test with larger concentrations in order to make the effect more visible. Sometimes this creates a new effect where you overwhelm a process. Sometimes it just shortens the test and saves the lives of a lot of mice.
If you are a programmer, think of it as stress testing. I'm testing a concurrent memory allocator right now that I suspect sometimes corrupts itself. I'm hitting with an insane barrage of allocation and deallocation calls, way more than any recreational software user would ever do, trying to provoke it into failing. So far, no luck, but if I can get a failure I will have saved a great deal of time over testing it with normal call rates. On the other hand, if I tested it by just doing an insane number of allocations, I would provoke a failure completely unrelated to normal use (out of memory).
It depends, did your stomach rupture in an Alienesque scene? If so it might be specifically related to the quantity.
Did you see increased cancer incidence (granted that would be a longer study)? You might have been eating apples treated with daminozide (aka Alar, out of use in the US since 1989 but likely caused a number of cancers before then). Your larger doses exposed a rare but real effect.
The "Alar Scare" is a good example of elevated dose testing. It possibly does cause cancer, but the extreme elevated doses at which it was tested in the '80s probably exaggerated the effect.
The difference is your test case scenarios will not result in any policy change that could potentially lead to throwing a person in prison for an unspecified duration.
The irresponsibility shown by this, and other news outlets, allows for (potentially willfully) ignorant candidates and uninformed individuals who want to perpetuate the narrative of "Reefer madness" to do so.
The results are not conclusive regarding any human interaction, but the article states "But at a bare minimum, these findings suggest we should be avoiding recreational cannabis use during pregnancy. ". This was a clinical trial with mice, dealing with a sensitive public issue. Ars fueling the media fire by not underlining the usage of an extreme amount of the underlying chemical does nothing for our overall public health and wellness, but does (possibly unintentionally) exacerbate the drug legality discussion around the world.
If you are a programmer, think of it as stress testing. I'm testing a concurrent memory allocator right now that I suspect sometimes corrupts itself. I'm hitting with an insane barrage of allocation and deallocation calls, way more than any recreational software user would ever do, trying to provoke it into failing. So far, no luck, but if I can get a failure I will have saved a great deal of time over testing it with normal call rates. On the other hand, if I tested it by just doing an insane number of allocations, I would provoke a failure completely unrelated to normal use (out of memory).