it is more like inevitable than anything else!
when you create some shitcoin you are creating money for yourself. and when it is very easy to do so and you can make a lot of money out of it sometimes, there is nothing stopping you from doing it. these days with ICOs things got way easier!!!
do we need them? obviously not
are they contributing to anything? not at all
are the damaging? of course. they have filled the market and took the top ranks everywhere with their pumps.
I can see the same picture of it though. It is really inevitable, besides because of its decentralization nobody would stop you from doing it. I have heard also some of people or traders that are making money outnof shit coins, at first i really didn't believe them but once i saw how is being done and the worst is that it is very risky, i just ignored it and think another way of earning.