Hi Mohammad,
No the fact is that beauty is a matter of opinion, and cannot be demonstrated to be real in any way whatsoever. Which is because agency of any decision cannot be demonstrated in any way whatsoever.
While the perception of beauty is indeed subjective, both (a) our capacity to respond to beauty and (b) the effects of our responses can, in fact, be demonstrated to exist in reality. We understand that our brains are the physical source of our capacity to feel awe at the beauty we perceive in a gorgeous sunrise or sunset, at a piece of renaissance artwork, or at the sight of a beautiful person. While we might individually differ in our opinions on how beautiful this or that is, we know it is true that all possess the capacity to perceive beauty. We can also measure changes in body chemistry as such experiences are experienced. You will be hard pressed to find someone who believes that beauty is not something people actually perceive and experience, Mohammad.
Concerning the belief in deities, the same holds true. The
belief in deities is a real phenomenon. I sincerely doubt that all theists are liars, which would be the only alternative explanation. So many people claim that their believed-in deity or deities actually do exist in reality.
That people believe in them is not what is generally questioned by atheists, though. What is questioned is the actual existence of those deities in reality. Whereas inspiration from beauty and other subjective feelings (e.g. love for another person, anger at another person, etc.) are understood as phenomena that really occur in the brain and are responses to real phenomena (to objects of beauty, to beloved others, etc.), deities have yet to be demonstrated to exist beyond the confines of human imagination.
Your analogy thus fails, because you are comparing the subjective perceptions of beauty to the objective existence of a deity or deities, whereas the more accurate analogy would be between two subjective perceptions: of beauty, and the
belief in a deity or deities.