I don't understand the angst? Infringement is also defined in the Act (which I linked to for easy reference).
I understand that "copyright infringement" (the legal term) may feel like, and for all intents and purposes be equivalent to, the theft of physical property for some people. I'm not disagreeing (or agreeing) with that.
However, our laws and those of many Western countries, treat the two as completely separate offences - but people often claim that they're the same (in the legal sense).
It's like astronomy versus astrology... to many people, they're effectively the same thing and they don't care one iota about the difference. Doesn't mean that they're the same