The part you quoted says that decompressor + compressed data must be smaller than the original data. You can make the compressor arbitrarily large, but it will

The part you quoted says that decompressor + compressed data must be smaller than the original data. You can make the compressor arbitrarily large, but it will not allow you to "cheat" in the way you stated (by moving data into the decompressor), because you'd also have to increase the decompressor size for that.