It kind of does. Magic is a huge, popular game and the physical version of the game (not Magic Online) is played almost entirely in places where there is no inherent record of the details of the match. Yeah, some tournaments include records of decklists for everyone in the tournament and sometimes they go even further, but usually that's not the case. To actually collect data on things like mulligans and "interactivity" (whatever the hell that means) requires observation, and observers draw attention. You can send some covert record-takers to some tournaments in some places, but that sort of thing becomes impossible to hide after a while. And WotC would have no reason to hide it anyway. Quite the opposite: it would benefit them to make this public, for ease of coordinating with tournament organizer's, judges, and other people involved in tournaments. Also, they could use it to signal to players that they're watching and can use the data they collect to make the game better, which is a minor thing, but it would still make sense. It is not realistic to presume that WotC employs an international network of secret agents to collect data on Magic games, so they can have the data but the rest of us won't know that they have the data. Besides being incredibly silly, it would require the spies to keep their mouths shut after they move on to some other job or else we'd get scandalous "Covert Magic: the Gathering Tournament Match Data Collection Agent Tells All" articles cropping up. I know about the old saying that absence of evidence is not evidence of absence, but it's not quite right. If a claim is made and one could reasonably expect to find certain evidence to match it, then failing to find that evidence (or indeed, any evidence) is sufficient to dismiss the claim.