> Countless ideas never got off the ground because the innovator refused to talk to investors or partners without an NDA or withheld important details.

If I had a nickel for every time I've seen that... I've met enough of these types as a freelancer that I have a fairly hard rule of not doing business with people who think their ideas are the most valuable contribution. Even if they have money I will avoid them because they're not worth the hassle (although the two are rarely seen together).

If you think your idea is that easy to steal then you have no idea how the implementation will work at any level. The odds that you have identified some truly "low hanging fruit" is exceptionally low. It's probably that you just don't value any contributions but your own.