There definitely are egos, but I feel like so many people are really dancing for fun and wanting to get better, not to impress others, but because it's a fun challenge against oneself!
It's just a matter of what you're looking for -- if you want to see egos, yes, there are plenty of egos in the scene. But, if you want to see people who are in it for fun, they're out there, too, in even greater numbers, I believe. The general perception may be skewed because the dancers with the egos tend to be the most conspicuous -- using the flashiest moves, wearing the flashiest clothes, going to the most popular clubs, picking the spots on the dance floor with the highest visibility, etc. However, as a practical matter, there simply aren't enough of those people to keep Salsa alive. At its core, Salsa needs people who think of it as fun, and who visit the clubs for socializing, or attend concerts by various musicians, or buy the music to play at their house parties, wedding receptions, etc.