> One coulld hire a software developer to write such a program. But, in general, software developers can be untrustworthy and prone to stealing ideas for their own selfish purposes.

Ehhhh? Yes there are examples of that, as there are for any arbitrary group of humans you could select, but [anecdotally] I've noticed the opposite... it's not uncommon to find a passionate developer that's only interested in the challenge/problem solving aspect - it's a lot less common for say.. real estate agents.

I don't really get the point you're making beyond "people be greedy sometimes" (which I do agree with, don't get me wrong).