Make no mistake about it. There is an objective reality. All subjective experiences can ultimately be reduced to objective phenomena: physical brains with its neurons and various chemicals arranged in a particular way.

That's not to say that subjectivity isn't important. The mere fact that we have subjective experiences to begin with dictates a lot about the kind of universe we live in. We have to live in the kind of universe where atoms can stay together, where heavy elements can be fused together in star cores and supernova explosions, where self-replicating molecules can use complex combinations of these heavy elements to undergo Darwinian natural selection, and where evolution can give rise to brains capable of processing information about the universe.

Our subjectivity is a way for the universe to understand itself, and arguably this is necessary in order for a universe to exist in any meaningful sense. After all, if a universe does not contain conscious beings who could ever possibly observe its existence, in what sense does it really exist? A universe that is never observed and never observable does not seem to be any different from a non-existent universe. According to this view, the universe exists because we do, and vice versa, so the existence of subjectivity and objectivity are dependent on each other.

I'm not entirely sure that existence really ought to be defined like that, but it's an interesting philosophical train of thought to follow anyways.