They have to provide and pay for additional training if they want people assuming additional tasks they aren’t trained for. Have you talked to your boss about it? CEO? Personally I’d not touch medical topics no matter how many articles they give me to read or use as reference. I don’t know if these articles are valid! How do other people feel about it?

Falls prevention? Like how not to fall? You aren’t a doctor.

No you aren’t being obstinate or difficult. They are being unreasonable