If we collectively agreed to do it, that's not an issue

You provide a copy to a specified organisation which will keep the physical copy locked until date X. If you release something on local market and the source is not deposited, you get fined until you do. It would only need regulation - which of course we won't get due to many companies that would fight this idea.

We already do this with national libraries holding a copy of each book ever published. We can do it with software.

How do you figure? Your position sounds like "oh we made this thing but no, we cant show you how, too hard". That is not generally acceptable in society. Can you point out where I've misunderstood you?

Trade secrets have been an accepted part of society for a long time. Coke and KFC don't have to tell you their formulas. Tesla doesn't have to tell you how Autopilot is analyzing images.

Unless you want patent protection, you have no obligation to show your process.