> But as we saw due to AI more and more bugs and exploits are being found, some dating back years of releases.

The source code being available doesn't mean there wont be any bugs, it only means that it'll be possible to find and fix the bugs without waiting whoever gatekeeps access to that code to do it for you.

Similarly, the weights being open, means that 3rd parties can potentially locate and fix issues with them without waiting for Qwen, ZhipuAI, Mistral, or whoever else to do it (who at that point might as well have moved on).

And yes, open weights wont prevent a model from being poisoned, just like open source doesn't prevent software from becoming buggy or exploitable. Where it helps is for 3rd parties being able to find, fix and release the fixes without depending on the original creators.