Misrepresenting your ability
is morally wrong and can cause actual harm - personal, economic, or other forms of harm.
You cheat on your test and become a lawyer, I may end up in jail because of your cheating.
... Or, you become a teacher, and my education is harmed.
... Or, an activity worker, and I fall off a climbing wall.
... Or, a scientist, and I waste time and resources repeating an experiment because you didn't understand what you were doing and lied to cover it up.
... Or, become a shop worker and I get short changed.
... Or, make sandwiches, and kill people because you don't follow basic hygiene and cheated to get your certificate.
... Or, a million other possible scenarios where people trust you to represent yourself so they know whether you're capable of carrying out the tasks you're set.