It's a matter between either being lucky or having a compelling enough story/background that people gravitate toward you.

I've heard a lot from the other side as well, technical people asking how to find the perfect business partner at a time when everyone has their own idea.

Ask yourself what qualities would a founder have to have that would make you give up your idea and join theirs. Then strive toward having those qualities.

In my perspective, if I see anyone hustling either by getting together a makeshift MVP or pre-selling to customers, then I know they have the drive to succeed.