You could believe that, and it might even be true, but it's no way to live your life.
The article has some extraordinary demands; radical openness, reflective practice, co-evolution, mentalisation... all things you'd associate with high emotional intelligence and hard inner work.
Some people just aren't up to that. Maybe we need to be able to say "that's okay". Humanists need not feel threatened by reductionists any more than reductionists need feel upset there is a bigger world "outside the test-tube".
Perhaps we should focus more on why some life-stances expressed by others feel uncomfortable for us.
What makes life enjoyable for me is exploring it so I've not found a dichotomy between a "humanist spiritual belief" and a "reductionist one". That's a smouldering flame war that started half a millennium back between Copernicus, Galileo and the church. May I suggest a cool read is "The Two Cultures." by C. P. Snow [1]. Snow thinks, as I do, that this artificial split holds humanity back. Albert Einstein is also a great study to get into this groove.
If I am objecting to anything (not sure if I am really) it is the strident certainty with which some who have explored part of the territory declare that there is nothing more to see. That applies to either side. Maybe there's stuff that would make the material facts of physics and biology that much more wonderful and enjoyable to behold.
[0] "The world is all that is the case" - Wittgenstein
Of course the downvoted comment is just speculation about people’s inner life and motivation. Just like the claim that it might
> [pain] people to admit
to your viewpoint is. Or “I really think it stems from religious biases”.