This is not good since a large power surge from unreliable power, or lightning hitting your home electrical wires can fry a power brick.
Sometimes if you are lucky, replacing a broken powerbrick with a new one sometimes fixes your console since a lot of power bricks also protect your electronics from high voltage power surges from frying your electronics. If you know hoq to fix power bricks, replacing the fried parts inside the power brick with working parts can fix the power brick.
Power bricks also eventually break like most electronics because of heat, power surges, and the parts wearing out over time.
I guest Sony did this to save money since they could use the PS4 case to cover the power adapter, and bundle one less wire.
The Xbox One comes with an External Power Brick which is replacable.