Most successful startups don't end up with the idea they started with.
In fact, around 95% of those that eventually get acquired or go public do so after pivoting - sometimes more than once.
It's a lot like building software: the first version is almost always thrown away. But without that first version, there's no foundation, no real feedback and no spark for version two.
That's why obsessing over every detail before launch is often a waste of time. You can't think your way to product-market fit in advance. The market has the last word, and it rarely says what you expect.
So don't wait for perfect. Start messy. Build, release, learn, repeat. That's how real breakthroughs happen. Dropbox, Slack, Twitter - none of them looked anything like their final form when they started.
Launch early. Be wrong quickly. And keep moving.