You raise a great point and honestly my two hypothesis are
1) People would realize that its very valuable to get the opinions of strangers before "wasting" time creating something they think they might want. One could argue that talk is cheap but I'm sure this guidance can lead to very valuable results maybe rethinking the idea or whatever the case.
2) You don't need domain experts in the beginning per se, just a bunch of minds who can quickly determine if they would use or not use a service. The motivation behind domain experts joining in the future might be just to help and give back to the entrepreneurial community (I admit this last point is kinda corny lol)
2) You don't need domain experts in the beginning per se, just a bunch of minds who can quickly determine if they would use or not use a service. The motivation behind domain experts joining in the future might be just to help and give back to the entrepreneurial community (I admit this last point is kinda corny lol)