Why does he keep telling me to change career?

I’m in a very good career, but it’s different from what I studied at university. I am happy in my career and it’s a lot better than my old industry. My ex keeps saying I should study again and go back to my old career. He keeps saying I was good at it and he thinks my current career is “boring”. We got together when I was a student at the time, he’s ten years older than me so he's been working since he left school. Why does he keep saying I should change career? I’m happy in my current one and I enjoy it, it’s also better

Why does he keep telling me to change career?
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