Most of the projects you see are unable to implement a prototype, and the community doesn't ask questions. What matters to the community is that the token is tradeable, and it doesn't matter what happens next.
Very few projects have accomplished their roadmap and created a prototype; they make their whitepaper and roadmap look good and promising so the people will think it's another Ethereum or other established coin, and because of this, it will have a good price in the market, so what they are really buying is the promise and not really the implementation of the roadmap.
The majority of investors are hungry for profit; they check the potential in the market, not really the usability of the platform.