It’s okay to say “I don’t have enough information to form an opinion on this subject”. It is okay to say “I have been presented with new information and I decided to change my opinion on the subject”
We have a whole big internet to look up information. We have all kinds of reputable, free scholarly studies (Google Scholar is a GREAT resource as well as ResearchGate) as well as website that shows the multiple sides of all kinds of arguments (ethical issues, science issues, law issues, among many other things).
Don’t be afraid to ask for help from the experts. Don’t be afraid to ask for information from people who have been studying the field for a long period of time.