How many Yugioh video game fans have ZERO interest in real Yugioh cards?
Now, yeah, maybe they don't all actually want to play the real card game, sure. It's more expensive, time consuming, inconvenient, perhaps even embarrassing, etc to play the real game, and those practical reasons are probably why the bulk of gamers who don't play the real games choose digital Yugioh instead.
However, the vast majority would play real Yugioh if they were rich, had unlimited time, could play in private; they'd fly to Epstein Yugioh Island, grab their decks, and blow their Life Points using real cards. That's the undeniable reality, with their practical reasons for abstaining from real Yugioh removed there's no barrier to engaging in their real interests anymore.
I will concede there's possibly a negligible minority who just truly have no interest in playing the actual card game, maybe some minutiae exclusive to the video game experience is somehow integral to their interests for them. Perhaps the UI, music, monster animations, etc which cannot be replicated in real Yugioh are enough to be a dealbreaker on their own. But that doesn't change the fact that the overlap is like 99%.