Maybe but still a little better than closed source like Windows. Everytime whem someone asked me if I could hack my way into his Windows PC I always told "After all it's Windows, how bad can it be?" Doing that since 25 years still waiting for a Windows machine that doesn't open... On the other hand I failed to open about 50% of Apple Devices I was asked to open and about 10% of Linux machines. (Not because Linux is insecure by itself but because most Linux distros install with insecure defaults and users don't care.)

Of course, I'm not saying closed source is better. I'm saying that just because it's open it doesn't mean people really care to read it thoroughly.