Yes, that's why im saying that this kind of problem isn't something particular about this project.
In fact I'm not sure if it's the case that the builds aren't reproducible/verifiable for these binaries in ventoy. And if they aren't, then I think it's in the upstream projects where it should be fixed.
Of course ventoy should try to provide traceability for the specific versions they are using, but in principle I don't think it should be a problem to rely on those binaries if they are verifiable.. just the same way as we rely on binaries for many dynamic libraries in a lot of distributions. After all, Ventoy is closer to being an OS/distribution than a particular program.
I'm ok with not considering it "public good" when something has a license that sets conditions and it's under Copyright of a particular private person/entity. But if you do need to ask consent to a private party for the use of something in a derivative work of certain conditions, then I don't think it makes sense to call it a public good.