Chemotherapy has a stigma associated with it.
Many just think you're an absolute mess of illness, depression with no life. That chemo is a 'poison' - which in a way it is to be honest, as it kills your good cells and kills the white blood cells. But its proven to cure.
Some just have no idea at all about Chemotherapy, as they haven't been exposed to it or aware to it in a close proximity.
You also get the few that unfortunately just don't have the care to know.
But it's how the chemotherapy effects you which is individual to each person.