Let's say you have 5 players selling car tires. There are 1000 cars in the area, and only one brand of tire to buy. For the most part, these 5 players compete on something other than price, since the market is mature. They have 20% of the market each.
Let's introduce 3 new players into this market. They bring nothing new to the market per se, but by default they get some sales (maybe they are closer to the car owner's homes, maybe they have a hot chick at the front desk). Nothing major, let's say they share 10% of the market overall, and the 5 incumbents lose 2.5% of their sales each.
The incumbents panic and look to counter this threat, and one of them happens upon the fact that if you change the formula for the tire a little, you can get a 50% increase in performance and a 20% increase in lifespan with only an extra 5% in manufacturing costs.
Now everyone scrambles: Some into R&D, some into improving customer service, some into death. The overall value of this market increases, because of the 5% increase and corresponding price increase... inflation, if you will.
This innovation happened completely and only because of the dreaded saturation of the market you are complaining about. The quality of the noobies is irrelevant, since the incumbent did the innovation. Point is the innovation happened, and wouldn't have happened without the new entrants creating pressure through competition.