Surely they would at least be protected by Database Rights in the EU (not the US):

>The TRIPS Agreement requires that copyright protection extends to databases and other compilations if they constitute intellectual creation by virtue of the selection or arrangement of their contents, even if some or all of the contents do not themselves constitute materials protected by copyright

https://en.wikipedia.org/wiki/Database_right

Those require the "database" in question to be readable and for every single element to be so too. Model weights don't satisfy that requirement.