* It's not a "game console" by definition. It's a box with semiconductors inside it which I can purchase for a few hundred bucks at any of many local stores. These semiconductors are equally well-suited for doing vector calculations in support of many applications, frivolous and serious alike.
* It's simply a mistake to think by not "supporting OtherOS" it will significantly reduce the "risk of new cheats" in anything but the very short term. OtherOS is happening whether it's supported or not. That's probably true of cheating too.
* But that's not even what Sony did though, Sony actively removed OtherOS from units people had previously purchased, and only then _after_ it had already provided its (relatively small) boost to hackers.
The idea of keeping secrets locked in a box that millions of people purchase and physically control is simply ludicrous and has failed every time it's been tried.