That distributing a binary app was a good idea. The attacker found and fixed the vulnerability. Of course it wasn't required to find the vulnerability, however

That distributing a binary app was a good idea. The attacker found and fixed the vulnerability. Of course it wasn't required to find the vulnerability, however if you make it then it's more likely that good guys will find and fix stuff. The contrary would be it's difficult to find this stuff, so then only highly motivated bad guys do it, because at that point 10 grand might not be worth it. Again, this was all prefaced with it depends. Some might see it as making it easier to find problems, and others might say 'yeah, exactly.". It's just an opinion. A fact is however that a binary makes it easier. Source code would be even easier.