Why is religiosity unscientific? No, God can lift a stone because Atheism is
not a proven idea. Physics must describe the stone and its motion principle.
Hence, to study the invisible God who can take it because Atheism is not a proven idea,
and came after the religious era of Europe.
Songs, books and movies, art exhibitions, ballet, international sport events,
organized education, and the quest for discoveries are an essential part of
humankind's spiritual heritage (spirituality). Spirituality is larger than
Science, but it is the temporary issue of a post-modern scientific community
and not the fallacy of being an inspired scientist or mathematician.
Atheism is lack of belief in God.
Atheism is not necessarily the assertion that God definitely does not exist.
So, when you assert that atheism isn't proven, you are trying to assert that atheists insist that God doesn't exist. Most atheists are not trying to assert that God doesn't exist, they merely won't believe in everything.
Since there are an infinite number of things to believe in (Santa, tooth fairy, Yogi Bear (not the baseball player), Fred Flintstone), it seems better not to believe in anything unless there is proof. Alternatively, we could believe in absolutely everything (I could fly away on my unicorn, at this point, and leave it at that).
Except for ESP (which could be verified by predicting future events), there is no proof that God exists. Even if ESP is used, we have to trust the psychic to believe in God, and the psychic has to have visions about God (and not visions distorted by Satan, that make us think that we have knowledge of God).
Sure, there are statements of the apostles, but there is scant evidence that the apostles existed, and scant evidence that they really wrote their own versions of Jesus's statements.
You claim that atheism isn't proven, but that makes no sense. Atheists don't assert that God doesn't exist. This is much different than asserting that God doesn't exist. So, it is lack of belief, which doesn't have to be proven. Belief, on the other hand, might require proof if you expect others to believe as you do.
Scientists study invisible things quite frequently. For example, electricity, magnetism, gravity, conservation of energy, conservation of momentum, etc. But they have good reasons for believing in these invisible things.