I think you’re misunderstanding. Rudy doesn’t call the players the game piece army or Timmys. Also the game piece army and Timmys aren’t even the same thing. He loves playing magic himself.
Timmys are people looking to get rich quick and are fickle, ready to jump on new hype and ditch it as soon as it gets difficult. They are more interested in gambling.
The game piece army refers to people that clamor for cheap cards and tout mistaken and oversimplified solutions with no understanding of how markets work or how successful businesses are be run. They misunderstand that these cards are also collectibles and how that works.
Also bonus: the MSRP gang are those who say anyone selling above msrp is scalping and claim MSRP is the true price. But back when market price was below MSRP, they were nowhere to be found.