Its obvious that lots of ICOs coming up are scams, filled with convincing words and ending up scamming their investors at the end of the day, this is not all, but most of these ICOs will survive, but not for a long run.
dumb statement
You see them as scams since you only want to earn tons of money in short time. This is not how ICO works. Majority of them providing utility tokens not security. Its up to you in which ICO you want to invest but its really dumb to think that you can buy lambo after ICO ends. You can make money using their product in one or another way. For example lets take ING token. It is worth nothing
1 cent or below
But if you want to use their product (free wifi) you have to pay tokens for it. You can become a provider and provide the internet for others which leads to people are paying you those ING tokens. The price is nothing but the point is you can set your own price for that internet. Or use advertising and etc to earn money. Shouting out that ICO's are scam is really silly. You have to look from the different perspective and use your own brain to earn money from those ways 
I am sorry as this is a bit off topic, but please do some research before saying that something is silly... Although you have a point in your statement and many people are only after the quick cash, you also need to know that a huge percentage (and if I remember correctly it is around 90%) os ICO's are scam... they collect the money and than fly away, or their idea will never become anything else than an idea, or they dissapear, etc, etc...
Bear markets are definitely the cleaners... it is the time in which a lot of crypto-garbage/scam dissapears and the market get's clean for a new bull run, so a lot of "coins" dissapear at this point...
On the long run there will also be a natural selection... some have real use, others will just compete to be the new "money"... only a few will prevail
you can also check the coin listings from 1 -2 years ago.... how many still exist?