IMO, whatever happened on Earth to create life has to have been replicated millions of times around our universe, to me it’s impossible to not beleive in alien life somewhere, has it discovered Earth and decided to visit here I have no idea.
You can believe this, but without evidence this is really a matter of faith more than anything else.
It is a matter of faith, whether you believe or not is up to the individual person.
I believe in intelligent in abundance spread out all over the universe, probably more than we can possibly imagine and I don’t think that invalidates any of my Christian beliefs, in my mind it enhances them.
Certainly, my beliefs can’t be proven and will never likely be proven in my lifetime, that’s okay, others may disagree that’s fine, I don’t really care.
A person without a bias (i.e., a clear and open mind) would see that there simply isn't enough evidence to draw any conclusions...yet.