I can provide some insights on this topic.
The question of whether everyone is secretly an atheist depends on how one defines atheism and the context in which it is used. Atheism is typically defined as the lack of belief in gods or the rejection of the belief in deities. Under this definition, infants and young children who have not been exposed to religious concepts can be considered atheists since they lack belief in any gods.
However, as people grow up, they are often exposed to religious beliefs and practices within their cultural and societal environments. Many individuals adopt religious beliefs and identify as members of various religious groups. In such cases, they would not be considered atheists because they hold a belief in a higher power or deity.
It's important to recognize that religious beliefs and spirituality are diverse and deeply personal for each individual. Some people may identify as atheists, while others may follow specific religions or hold agnostic or spiritual beliefs.
In conclusion, not everyone is secretly an atheist, as people's beliefs about the existence of deities or higher powers vary widely based on their upbringing, personal experiences, and philosophical perspectives. The spectrum of beliefs ranges from atheism to various religious affiliations and spiritual beliefs.