If "everyone cashes out" when the price is high that means the coins will be distributed amongst all the buyers unless it's just one single whale who comes in and buys up ALL the coins (highly unlikely, especially if the prices are high). Having as many stakeholders as we do in NEM means that as we initial stakeholders begin to sell off some of our coins after launch to the general public, the coins will become much more widely and more fairly distributed amongst the populace than they ever possibly could from a small group of initial investors like NXT had. 2000 is 20 times greater than 100, that's not an irrelevant amount at all. The more people you have initially, the greater the chances are you are going to have more people selling their coins on the open market for a more even distribution. With only 100 investors, the likelihood of any of them selling very many is low as they hold out for higher and higher prices, and then when they dump it's going to fall extra hard. Having 20 times more initial investors makes us much less susceptible to such problems, but of course it could *always* be better as you say.
It is naive to think about distribution in term of "fairness". Every single coin community except Bitcoin is built entirely by a group of hard-core supporters which often has less than 100 members. It is fair if they have the majority of the stakes. Having something for nothing does not seem "fair" to me. The problem with NXT distribution is the incentive mis-match because the 5% whales do not contribute much (relatively) to the development.
As for a distribution of 100 (typical alt is more like 20-50) vs distribution of 2000+. It doesn't scale to world population (dumb rhetoric) but it shows that anybody could had got in. The thing is if you have less than 50 they may as well be relatives / friends of the coin creator. When you have 2000+ almost all will be strangers with no connection to each other. That's just the point and why 2000 - 3000 is sufficient, anymore defeats the purpose
All reasonable points, I haven't looked that way. I'll think about it.