The person you replied to did not demand anything but instead theorized about a way to fix it.
I love how you assert that literally anybody could check out Chromium and fix the sandbox, a sensitive security-essential part of the browser, with very little effort required to appreciate the source and all of the moving parts.
Not dumb, there's just a lot of skills assumed to work on the security components of a modern Web browser. I would never claim that I could turn around and fix this bug as an outside developer. Words in my mouth.
In my opinion, this is one step away from sacrificing a virgin to make it rain. We should control our own software destiny and not just hope other people will do it for us.
I love how you assert that literally anybody could check out Chromium and fix the sandbox, a sensitive security-essential part of the browser, with very little effort required to appreciate the source and all of the moving parts.