Determination. (project Ambiance)

This is what I always miss.
I know a lot of decisive and strong-willed people. But I myself am not one of them. Of course, I am able to make a decision, and I make it several times every day. But I always have a feeling that this is correct. I always doubt it. They say that this is a property of a developed brain and even a sign of intelligence. Maybe.
But I see around me that this is not so. Decisive and uncompromising people achieve everything in life quickly and without stress. And we, timid and doubting, remain on the sidelines.
As for me, I'd rather stay on my sidelines than become a determined person.
Determination in people scares me, to be completely honest.