There are two parts to this statement and to the second part, Human existence based on the environment of the planet seems like a good philosophy. It accounts for life being generated when the right chemistry and environment exists, it accounts for evolution, adaptation, diversification of life forms, etc. All that is consistent with observations as far as I can tell. Now about the first part, "the Universe has no fundamental purpose, it just is." That I would say is a widely accepted philosophy in an area where there is a wide scope of opinion. Personally I agree with that view but I respect different views of the origin and the purpose of the universe. My view is based on my belief in the possibility that the universe has always existed. If it has not, then either it came from nothing or it was created. Both of those possibilities have supporters and I respect their views as I expect them to respect mine. But respect ends when someone insists that any particular view is right or wrong unless they can produce evidence to support a particular view. I don't believe there is any irrefutable evidence of either the existence of a Creator, of the generation of something from nothing (I mean nothing, no universe, no space, no energy, etc.) or that the universe has always existed. It is a personal view and our personal views are often the result of a personal decision.