"lots of theft is not theft. Like for instance, all these things that are not theft"

... Lots of murder doesn't have a victim...

.... Lots of arson doesn't involve a fire...

... Lots of trespass involves not taking a single step from your work desk ..

... War is peace, peace is war...

I think the above things are commonly considered theft. Totally fair to contend that the definition is wrong (and IMO that's a reasonable-minded contention), but I don't it's particularly double-think to bucket these digital "thefts" in the same category as physical thefts, either.