So I just read Bill Gates’ 1976 Open Letter To Hobbyists, in which he whines about not making more money from his software. You know, instead of being proud of making software that people wanted to use. And then the bastard went on and made proprietary licences for software the industry standard, holding back innovation and freedom for decades. What a douche canoe.
The exploitation of private property is derived from the exclusion of labor from its product - maybe you have a different understanding of what ‘theft’ means, but it’s the principled exclusion of what labor produces from the labor producing it that is the basis of marx’s claim of ‘exploitation’