Ask HN: How do weigh the financial outcome when starting a startup?

When starting a startup, there's typically a slog time where you got some funding but the startup progress is kind of slow.

This time period can be short if you got lucky with your parabolic growth. But often times it could be multi years.

How do you shrug the self doubt that tells you: You would have done so much better financially if you just keep your FAANG/Unicorn job.

Financially, the probability of capturing the upside of making a startup seems small compared to just keeping a day job. I am having a hard time justifying it in my head.

Any opinion or suggestion on how to overcome that feeling?