I would agree with that. A proper noun is one that is usually capitalized, and the person, event or place that is named is generally considered unique. For example, "White House" as the residence of the president of the United States.
"I want to visit the White House" not "I want to visit a White House." If you said (not wrote), the last sentence, it would sound like your preference was to visit any house that is painted white.
Student or Learner