Raw data is needed here, not statistics if we want an true answer.
Sorry, that's not how the real world works. Statistics tells us an enormous amount of information. I suspect you're only rejecting it as not a "true answer" because it's an answer you don't agree with.
Stats are relevant if the sample size is a random/representative part of the population. Here, it is made from the people who registered to that website and I don't know if it is representative of the whole HS population (maybe people who registered to this site are more advanced players or have access to more non-basic cards than the average player).
Maybe those stats are relevant, maybe they aren't, I don't know.