DRK covers a real world need that LTC (or BTC) cannot cover. It is superior to LTC technologically, safer, more private, scarcer by a ratio of 1:7, has 1/10th inflation (2880 coins per day vs 28.800) and pays its users who allocated 1000 DRKs for running a supernode, for providing the anonymity service (Proof of Service).
In which world does an inflation of 2,880 vs. 28,800 equal one tenth, when something is scarcer by a ratio of 1:7
I'm comparing absolute numbers for inflation but your point is valid when you add both these facts together.
In terms of economics, the real point in altcoin inflation is this: How many USD are required per day to buy your daily supply.
LTC: 28.800 x 11$ = 316k USD
DRK: 2.880 x 12$ = 34k USD
Over a year, LTC will require 115mn USD to preserve its price (or 57.5m USD if miners hold 50% of their mining).
Over a year, DRK will require 12.4mn USD to preserve its price (or 6.2m USD if miners hold 50% of their mining). Even if DRK quadruples in price it'll still have a low requirement of 50m USD / 25m USD for 100% selloff and 50% selloff.