Why is earning money so hard?

I haven't really worked for me in my life. People who are younger than me seem to pull off part-time jobs. I am a post-grad student with no part-time experience. I am struggling to find both part time and co-op. I don't why making money seems like a hard thing to do. I am hard worker when it comes to studies, house work or pursuing a passion, and even while applying for a job? Why is earning money so hard?
Why is earning money so hard?
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