Bio-ethics is an extremely important aspect of the field in most research involving human and animal subjects. When we don't know about bio-ethics, we do fucked up shit as a society like the Tuskeegee Syphilis Trial. We did gain useful medical knowledge from that study but it had a massive human cost, most of which was borne by a poor community mostly made up of one racial minority. When bio-ethicists get things wrong there is absolutely a horrific cost and when I did bio research I had to take an ethics course every 3 years.