So I am watching the show which makes an interesting point - other factions are interested in Cortázar and his knowledge. BUT!

In the books, Protogen scientists are taken away and imprisoned (as seen in Vital Abyss). They are interrogated quite a lot, but when things start happening on Venus or after Venus, Belt just doesn't tell them. Wouldn't OPA (and Fred) like to know what's happening?

Or they just didn't want to get them involved because of their crimes? I get that Earth or Mars couldn't get to them (or even knew they existed?), but I think OPA would like to understand protomolecule, no? Instead of leaving them in that big room.