The statement (in quotes) means nothing without further context. It seems like an off-the-cuff unwanted, pseudo-intelligent comment by someone of limited thought. Who said it? What does he suggest we do with this revelation?

Be assured that learning a language will take a lot of time. What is your reason for doing it?

Otherwise that is a useful tool to help you open another window to explore another continent. Without this tool, you may be stalled in your territory. Language is not a magic that can always pop up new things but it is a useful "witch craft" enabling you to reach a higher position. 

Time is an important factor to affect if you are going to invest to learn a new language. Most languages have to cost you at least 1 year hard study to speak and listen at an average level whereas most adults have regular work and chore to do every day. That is why learning a language is only a task pertaining to a small group of people who wish to study overseas or travel around.