What is it with Age Discrimination?

Age Discrimination is very much real. Mostly, in the workforce, but with relationships as well. Why do we judge a person because of their age? Who ever said age makes a person mature? From what I've learned throughout life, it's your experiences that make you mature. Yet, Age Discrimination is probably the most underrated problem that happens in America without any awareness of it. I am 20 years old and I am an entrepreneur. I get pushed off to the side by many colleagues because they see me vs all the other aged entrepreneurs. What's your take on this?
What is it with Age Discrimination?
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