Answer:
1- They can offend people
2- Gender stereotypes can hurt people's feelings because for instance, if someone says you can't be good at a sport because your a girl, it can hurt their feelings and cause them even depression.
3- Stereotyping someone can be harmful because words can hurt and make someone really depressed right up to the point where they might even think of harmful events to themselves. :'(
Step-by-step explanation: