How can some people choose a career, a job, or any course of action, and go all in, without thinking of all the other options I could have?

I know this happens for some men in relationships with women, and they can't commit because they think of all the other women they could date. I date only one woman. But I have this problem professionally. I can't commit to a job or a career path.

How can some people choose a career, a job, or any course of action, and go all in, without thinking of all the other options I could have?
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