What law? The law you linked is 100 years old, and was superseded 50 years ago. The doctrine you linked explains exactly how it does not apply well to digital works, because you're making a copy (which first sale doctrine does not allow you to do) when you sell it, and also because you weren't sold the work in the first place, you were licensed it's use, and you can't sell or transfer licenses under first sale doctrine.
I agree this is counter to the spirit of the first sale doctrine, but that means laws need to be updated, not that a new law was created to deny you rights.
Literally in the first paragraph of the link you sent me about the 100 year old law, it said that it was repealed and superseded in the 70s. I don't think you're even reading the sources you send me. Are you just generating responses with ai?
Again, what law is being broken by steam? First sale doctrine does not apply to licenses, it applies to products, and furthermore you cannot transfer a digital product without copying it.
We can't just say that they're breaking the law as were wish it existed rather than how it actually is, but I agree with your goal, that software should be resellable.