It was simply indicating the severity of the problem. In talking with people since the announcement broke, we discovered more than a few players, retailers and promoters thought there was an unwritten tolerance of a few grams.
I thought I read somewhere that Dave Dunipace said that many plastic blends will absorb small amounts of moisture, effectively adding more mass to the disc. So let's say I were to buy a disc the same diameter as the Wizard, and scale weigh it to ensure its legality right after purchase and it weighs in right at 174.1g, but then I'm playing a tournament in a more humid environment and the disc absorbs some of that moisture and scales out at 175.0g. Even though in this example I did everything in my power to make sure the disc was legal, a circumstance outside of my control caused me to be illegal. I feel like the way the rule sits now could alienate a lot of players and create quite a large amount of conflict at tournaments. It is examples like the one above that make me believe that there should be a small tolerance in disc weights.