First of all, I have more in common with atheists than religious people, so my intention isn't to come here and attack, I just want to hear your opinions. Maybe I'm wrong, I'd like to hear from you if I am. I'm just expressing here my perception of the movement and not actually what I consider to be facts.
My issue with atheism is that I think it establishes the lack of a God or gods as the truth. I do agree that the concept of a God is hard to believe logically, specially with all the incoherent arguments that religions have had in the past. But saying that there's no god with certainty is something I'm just not comfortable with. Science has taught us that being wrong is part of the process of progress. We're constantly learning things we didn't know about, confirming theories that seemed insane in their time. I feel like being open to the possibilities is a healthier mindset, as we barely understand reality.
In general, atheism feels too close minded, too attached to the current facts, which will probably be obsolete in a few centuries. I do agree with logical and rational thinking, but part of that is accepting how little we really know about reality, how what we considered truth in the past was wrong or more complex than we expected
I usually don't believe there is a god when the argument comes from religious people, because they have no evidence, but they could be right by chance.
The biggest issue I have with your points are you can apply that same logic to all kinds of absurdity. Pick one or create one and it applies.
I also disagree with you that it is a healthier mindset to believe in essentially an unlimited amount of possibilities (unlimited because you can't define an unknown in this case) but whether something is healthier or not is not a factual statement. It is just a subjective statement that is based too much on the individual and the mental status of that individual to determine if it is healthy or not. I could argue that it was unhealthy to believe in what I used to believe(specifically evangelical/Protestant Christianity) because of my underlining condition of dealing with obsessive compulsive disorder and depression, but that claim of being unhealthy doesn't hold much weight because again, it depends on the mental state of an individual.
For myself, yes I am an atheist and yes if I come across evidence that convinces me differently then my views will change, but that doesn't make my current stance any different or say weaker as some weak atheism(I find that term laughable), especially when I don't have the knowledge of what that evidence would be to convince me.
Also remember, theories are believed to be true until proven wrong when it comes to science. The word theory is used differently in science then in colloquial type of discussions. So for example, just because we believe the theory of evolution is fact, that doesn't mean we think a creation story myth is possible because we use the phrase, theory of evolution. I bring that up only because, the fact science has changed in the past doesn't mean we can't believe our current understanding as fact.