It's possible - I also play an account in Wild with mostly Silver leveled cards and it doesn't seem to ever face off with Tofu - very rarely in my Silver brawls either. Modern Champ is a completely different story; Tofu was selected for nearly 3500 Modern Champ matches last season and secured a ~65% win rate (for context, the next closest summoner was selected 1550 times, being Cryptic)