I seriously doubt there is competition waiting to steal my ideas. Heck, most of the time I can't convince people these ideas are good even when I try, and now you're saying there are people waiting to embrace my ideas with open arms without any prodding or explanation or grand vision from my side?

I see this attitude often, and I think it boils down to delusion of grandeur - people thing their ideas are so valuable that everyone will steal it or if things go wrong the whole internet will talk trash about it and their glorious future will be ruined forever. None of that ever happens of course, but what does happen is many engineers clinging to their ideas and half-finished products afraid to come out to light.