This is not true maybe some people but definitely not most because ICOs don't really help you learn anything about crypto until you start to invest. If you really want to learn about cryptocurrency start with the most popular which is Bitcoin there's a reason why it's popular in the first place.

I don't know what gave you the idea that ICO's are killing the crypto market since most of them eventually fail and it's very rare to see a token gain success even if they raised so much money during their ICO sale.