The copyright lobby hedge the term as "copyright theft" (i.e. not actual theft) in order to shift the societal understanding. Whish appears to have worked.
This is not a value judgement on copyright infringement. Just that technically it doesn't meet the legal definition of theft.
cf. The rather amusing satire of the "you wouldn't steal a handbag" campaign in the UK, which ran "you wouldn't download a bear!"
> Rather than "with the intention of depriving the owner", the US one says "with the intention of converting it to their use", which seems broad enough to cover exploiting a copy
...or rather, on the meaning of "converting". I've always theought of that as "changing", i.e. "it used to be one thing, and now it's something else". But copying IP only adds a use of it, it doesn't fundamentally change it in this sense: it is still available for the original proprietor's use. Is that really "converted"?
At least for the ordinary-English uuage of the word, I think it could be argued that it isn't. But then maybe this isn't just English; maybe the word "converting" also has some term-of-trade definition in that dictionary?
It seems unlikely this distinction would ever matter in a real court though.
That's simply not true. You might be confusing idealism about software freedom with how both law and society define theft.
Edit: In this comment I refer to the US.