Not exactly a lie, but I guess a drawback: while having a source code is nice in a way people could know that the program is safe, in the same way open source i

Not exactly a lie, but I guess a drawback: while having a source code is nice in a way people could know that the program is safe, in the same way open source is also more prone to getting hacked. The reason is because potential hackers could study the source code in-depth to figure out potential security loopholes/corner-cases, something that's a lot harder to do on proprietary software whom hackers don't have access to the source code.