That's not how quantum mechanics works though. That's the Deepak Chopra interpretation of quantum mechanics. In Copenhagen the state is fixed as soon as it becomes a part of a system. As soon as it acts upon the "cat killing device" the quantum state has been determined and so to has the fate of the cat.
The consciousness model for quantum mechanics is based on the old "I'M RIGHT BECAUSE YOU CAN'T PROVE OTHERWISE" doctrine. So even though you can't say for sure whether or not the state is fixed until you personally look at the result the fact is that every empirical observation ever made would suggest that the universe saunters on without giving a fuck whether or not there is a conscious human in the room with their eyelids open. Thus failing the Ockham's razor challenge because you would have to explain away centuries of scientific observations to even begin to acknowledge it.
The Copenhagen is the least presumptuous model of quantum mechanics. Is it right? who the fuck knows, but until it fails us, there's absolutely no point from a logical perspective to look elsewhere.