No, I do not think so.
Yes, human exists is the combination of a lot of chances and it is better we understand this.
If there is one thing needs to be changed, it would be the word 'believes". Atheist does not believe. The position of atheism is because there is not sufficient evidence to support the other position (that god exists). The evidences of we being here by an accident are abundant, just take a course in cosmology and evolution biology - a proper course, I mean.