He is just really ineffective at it, you have to do a huge sample size before the averages work out in his favour that he is just far too low impact and risky for any sort of use as card quality
A collector article has to make the card visually obvious, especially when similar names and rarity labels can mislead buyers

Attack #2: [2] Gnaw (30) Manufacturer: The Pokemon Company Related Products Rapid Strike Scroll of Swirls - 131/163 - Uncommon - Reverse Holo Sword & Shield: Battle Styles Near Mint 4 In Stock Near Mint 4 In Stock Near Mint 4 In Stock Tool Jammer - 136/163 - Uncommon - Reverse Holo Sword & Shield: Battle Styles Near Mint 3 In Stock Near Mint 3 In Stock Near Mint 3 In Stock Lightly Played 2 In Stock Necrozma V - 063/163 - Ultra Rare Sword & Shield: Battle Styles Lightly Played 1 In Stock Lightly Played 1 In Stock Lightly Played 1 In Stock Murkrow - 093/163 - Common Sword & Shield: Battle Styles Near Mint 4 In Stock Near Mint 4 In Stock Near Mint 4 In Stock Tapu Bulu - 016/163 - Holo Rare Sword & Shield: Battle Styles Near Mint 3 In Stock Near Mint 3 In Stock Near Mint 3 In Stock Luxray - 048/163 - Holo Rare Sword & Shield: Battle Styles Near Mint 1 In Stock Near Mint 1 In Stock Near Mint 1 In Stock Empoleon V - 040/163 - Ultra Rare Sword & Shield: Battle Styles Near Mint 2 In Stock Near Mint 2 In Stock Near Mint 2 In Stock Boltund - 053/163 - Rare Sword & Shield: Battle Styles Near Mint 4 In Stock Near Mint 4 In Stock Near Mint 4 In Stock

Example: You dont see me talking about Sleight of Hand Shadow since Ixalan , but two Opt seems to be the industry standard with your Fatal Pushes, Stubborn Denials, and Snapcaster Mages
And its an extra warrior if you care about that
"The beginning of the pandemic, the cards were pretty much at their lowest, and at the end of the pandemic, they were at the highest they'd ever been." In the hobby, quality is king