I always laugh at that scene! Like someone taught her how to socialize and read, and thought they were meaningfully impacting her life, but then Anna comes around singing, “I wish there were people, and not these lower life forms!”

Whelm and overwhelm are synonyms.

The way I learned it, is that people have a tendency to emphasize, so when became overwhelmed. You see the same thing with ‘good’, ‘great’, and 'epic’meaning the same thing within certain contexts.

Land Before Time