Quote from science_trader:
Couldn't say it better....
flat5, if you really do have that level, then do a search for 'Minority Game' on the net. Read a little and you'll discover what has been found and proved. From a toy market like this one, which displays stylized facts comparable to real markets, it is shown that speculators are a necessary group in a market.
http://arxiv.org/abs/cond-mat/9909265
http://arxiv.org/abs/cond-mat/0101326
http://arxiv.org/abs/cond-mat/0103024
Thanks for the refs. Looks interesting.
I might remind you, however, that we probably won't find the answer to why people might look down on traders from an academic paper on a mathematical model for market dynamics.