Science fairs always have hints of fraud around them. Many of the children putting out incredibly advanced research, beyond their capacity, are benefiting from their parents’ expertise, or friends of family, or access to labs, and such. It’s not talked about much but has been an issue for decades. As a side note, the criticism around this incident seems to have some racial tones. It’s weird to see tweets referring to…
For the first bit, unfortunately that's hard to control and is actually talked about quite a bit (speaking as a HS student). I would be interested in alternative suggestions to limit these advantages, but I don't think it's realistically possible.