You don't right. There are projects that have developed (already) products but they need funds to speed up marketing.
So they should just get funded by VCs, Why do they need tokens & billions of USD? Even 1 million $ is enough for every single project!
How much was the Whole ethereum project hardcap ?
ICOs cannot keep robbing people with white papers. 99% of icos scamming people! For example Recently GoNetwork basically did that. Raise 50 million and now have market cap of 3 million. And they have absolutely nothing to show for it.
Just check out recent icos performance. All below Ico price!

pic credit : icodrops.com/