Why do you friendzone people?

Do you do it because you view them as not good enough to date? The usual response is "I'm not into them" but it's too broad for me and I wonder what's hiding behind that very typical saying. I have become the champion of being friendzoned and have never been on a date because of it, not through an absence of effort on my part to evolve and mature though. What exactly makes you friendzone someone?
Why do you friendzone people?
Why do you friendzone people?
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