Are you being serious with this question?
Yes. there are a lot of competing ideas on evolution. Physical evidence is scarce. Sorting out the different beliefs is a real challenge. Making strong assertions in evolution is reckless. The creationists and ancient alien theorists make strong assertions based on no physical evidence but rather on ancient testimony and myths.
If you think evolutionists don’t make “strong assertions”, you are lying to yourself. All you have to do is read their conjectures about mutations and speciation to see that.