Well, how does it not necessary for a team to prove the viability of their project? If investors do not see prospects, they will not buy tokens of the new project.
Do not you know how many scammers in the environment of crypto startups?
Everything is so, because this is enough to present an idea, a site, a roadmap, white paper, a team. Nothing more. Enough to promise. There is no evidence, since it is impossible to prove the viability of what is not yet working.
If you come to an investment fund with this, you are unlikely to be given money to develop your idea.
And didnt you notice that investors are already trying to buy tokens of only those teams that at least offer to test a test version of the platform or application?