If you want to be absolutely right, overthinking is necessary.

If you want to be productive (while being 80% right), it isn't.

I've spent my (short) life overthinking and being "right" about things, but I've noticed that people that don't overthink and just go for something that's just kinda right have better results than me.

Maybe in the upper echelons of achievement (Elon Musk and friends), overthinking is necessary, because they've already used other resources (like, actually doing things) to the point of diminishg returns, and then overthinking can become a competitive advantage.

For the remaining 99.9% of us, actually trying things, even if not 100% right, is better, I think. I'm personally making an effort to reduce my overthinking.