Lacking belief is not what Athiesm is by definition.
Atheism by definition is.....
In the broadest sense, the absence of
belief in the existence of
deities. Less broadly, atheism is the rejection of belief that any deities exist. In an even narrower sense, atheism is specifically the position that there are no deities.
Athiests claim that God does not exist. If it was a mere lacking of belief, then the historical psychology of humanity shows that humans are built in a way to look up to a deity figure. So that a lacking belief system will result in belief over time as humans look for answers beyond the metaphysical.
True Atheism is flat out rejection of external deity figure.
Athiests don't lack the belief of an external deity, they oppose the notion and as a result they deify themselves as the harbingers of their subjective ethics and morals dogma, that they identify as an unknown phenomenona.
Essentially Athiesism has many gods in the making who have no absolute ethics and morals dogma, rather they see themselves as seekers travelling into the oblivion of the unknown.
Imagine a fairy tale of up and coming gods many, who don't even know themselves, which is why so many Atheists end up with more unanswered questions than answers, which results in emptiness and this is not me saying it but many Atheists on their last dying breathes who admit their futile and without purpose lives. How could Atheism extrapolate absolute truths when it comes to ethics and morals, when they have no confidence in themselves, that is they are lacking a role model, an authoritative fatherly figure who gives them those absolutes that they long for.
Lenin tried to take on that fatherly figure, but true Atheism at its core sabotaged his efforts. They preserve Lenin's body as a last desperate measure to look up to the father of Atheism. The case of the dead mans religion that Atheism has been revealed to be, nothing more than an ideology to obtain what is not obtainable.
Marxist-Leninist scientific atheism could not stand and was replaced by.....the liberation theology movements in Latin America among others, Marxist–Leninist atheism was rejected entirely.
So we have an ideology that is in conflict at its core and one that has no head. Like a headless chicken Atheism has kicked and kicked giving a sense that there is something tangible and real, but all it has been revealed to be is an ideology manufactured by man for the defecation of man and the path to oblivion.