Yes, absolutely, experts can be wrong. A good expert will acknowledge their hypothesis can be proven wrong. It must be falsifiable and subject to question. But at the moment, the best available evidence and weight of evidence demonstrates that evolutionary theory* ** provides the best model for explaining biological life. If there is a better model, supported by better evidence, so be it. That's fine by me.
* nb. What Do We Mean by “Theory” in Science? ( https://www.fieldmuseum.org/blog/what-do-we-mean-theory-science ).
** "For scientists, a theory has nearly the opposite meaning. A theory is a well-substantiated explanation of an aspect of the natural world that can incorporate laws, hypotheses and facts." ( https://www.amnh.org/exhibitions/darwin/evolution-today/what-is-a-theory ).