> This is really not true. If the idea is so novel that people can’t understand and want it when you pitch it to them, building it is not going to help.
In my experience that isn't true at all. I have often found that new ideas are often met with a lack of care but sometimes contempt or even disgust. People being emotionally threatened by new ideas is actually a thing and there is nothing you can do about it except fast forward to the future when those people have gotten past their inner conservatism.
It is so incredibly rare that something screamingly original is met with a positive reaction, likely because there is no positive frame of reference on which to build enthusiasm. The only time I have any luck in this area is when I pitch my original ideas to people who are extreme experts around in that area such that the idea isn't a creative stretch for them.
Even when I build the new thing the positive reactions are, at first, exceedingly rare. A new idea doesn't become popular until it is endorsed by popular people or by early adopters who enjoy experimenting with wild unknowns. People generally need to be told something new is good before they can reach that conclusion themselves, but when it does happen it happens like a flood.
Based upon these experiences I don't dick around with pitches. Unless you really REALLY need a favor from somebody you are just wasting your time, time that could be better spent just building the new thing.