The cat, the physical matter that makes up the cat, exists independent of whether it is being observed or not, though.
I have faith that the world is not a solipsist fantasy.
Observing, influencing, interacting, knowing - whatever you call it. Gravitation is a kind of interaction too. So each particle or combination of particles including human bodies may be regarded as an observer with its unique reality.
Yes, that's was its intended purpose, but it turned out that reality is as absurd as the example.
Not sure what you think that adds to the conversation....
each observer having a unique perspective
exists independent of whether it is being observed or not
Schroedinger's cat was not invented to explain anything. It was invented to show the apparent absurdity of the implications of the mathematics behind Quantum mechanics. It is an obvious paradox.