Difference between biologists and mathematicians

That is her definition of a mathematician. After receiving my master's degree in mathematics, and prior, my bachelors degree in biology, I have realized that mathematicians differ from every other number-based, science-based profession in our ability to want to undeniably prove ideas. That is, mathematicians are obsessed with proofs; that is, without a proof to a theorem, it holds no value and cannot be used confidently to explain a phenomenon. Biology, on the contrary, can get away without providing an undeniable proof; for example, if you have a sore throat and visit a doctor, you may quickly be diagnosed with have a viral infection without doing any testing to identify the main cause - no proof is provided to the patient, just a prediction.

What are your thoughts?