This is a normal reaction to taking the Discovery Survey. This happens because the survey is forced choice (e.g., forces you to choose between desirable options).
Research has shown that if we give people the ability to say everything good is “most like them” and everything bad is “least like them”, we wouldn’t get a very accurate picture of a person.
Plum wants to get an idea of your priorities. If given limited time in a day, everyone prioritizes some things over others. That is what the survey is measuring.
This information is more valuable to employers than saying you’re great at everything.