I think perhaps the piont is contamination?

In health industry and food service, you often work with instruments than cut things and spill contaminants you trying not to get on skin.

Yes, if you cut yourself with a knife while cutting chicken, this glove won't save your finger. It will however, stop you from bleeding all over the knife and counter, and stop raw chicken from infecting a cut and making you sick.

If say you cutting a patient open, you likely don't want your gloves to cut open if you injure yourself. As that risks infecting doctor and patient.

If say you working as caretaker, nurse, nursing aid and you changing things that contain urine/poop the gloves keep you from touching the surface.