Some thoughts:
-- There are edges to be found in any market, in any time frame -- intraday emini trading is no different. And you can be sure there are traders out there taking advantage on a daily basis.
-- I agree that a true, consistent edge is extremely difficult to extract for the emini market, but I can say this much: the person who has that edge won't be making 5k a month or 100K a year -- they would be making far more than that.
-- For certain instruments the electronic market
is the floor; I don't see why use of an electronic exchange would eliminate the possibility of consistent short-term profitability. Successful scalpers have always been around in the Chicago pits, it's not a big stretch to claim that they have their electronic counterparts.
-- A couple people have mentioned the difficulty in sitting in front of the screen each and every day while being patient in waiting for their spots; someone mentioned that being an intraday trader is not the same as being a
daily trader; these are great points and probably the main explaination for the dearth of profitable futures daytraders in the NY metropolitan area
-- Trend Fader, if those you've known in the business for 20yrs were successful during that time, it's likely they would stick with what made them successful in the first place, which might explain why you've not found any profitable traders in the relatively newer market of intraday/electronic trading. Retail electronic futures has only been popularized these last few years; it's my guess that anyone who has survived the learning curve for the emini's would not necessarily be known in the usual trading circles.