>And laws which allow this are obviously, by definition of the words at the time, not "securing" those rights to the authors and inventors. You can't secure something to someone by allowing them to (both post-hoc and especially pre-hoc) permanently transfer those rights.
I don't follow that those words are the "laws" you are talking about. The security of the right is the intellectual property. The patent secures the space the invention covers. The copyright secures the space the novel expression covers. Your interpretation of "secure" is completely specious and has no basis in law.
Can you point to anything to support that understanding of "secure"? It seems like you are doing the opposite than what you claim to be. Rather than reading "secure" as they meant it at the time, you are reading a new definition of "secure" based upon how you feel IP should be resolved today.
This is all besides that if an owner can license, then transferring the IP itself is trivial, as one can grant a license that covers all aspects of the exclusive rights.
I find it a bit ridiculous that you write "ways around this" as if your argument has any actual basis in law. It doesn't, and it seems like you have no experience in licensing IP rights. While that's not necessary to have an opinion, it certainly has not left you with an understanding of how things work such that you could base a reasonable opinion off of that.