Why do people assume I don’t have money?

So I was having a follow up for a minor surgery for a cyst at this private health care clinic in New York. I was asked at the end whether I had the money to pay and also recommended the cheapest follow up creams. I’m just wondering whether they did this due to my age, I’m 27, or because they judged me and thought I couldn’t afford it? It was only a small sum though about 200 dollars the follow up treatment.

Why do people assume I don’t have money?
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