Your terrible knowledge of economics aside…
Trading.
You can’t just dump everything on the market and play the 0.1 isk game anymore. You have to think about how frequently items are traded and how much the prices move, what’s a good price and a bad price. It is specialist knowledge.
Higher taxes encourages more trading via contracts, this is specialist gameplay like the hi-sec buyback program.
Mining.
Restricting certain minerals to certain areas of the game is specialisation.
Low sec mining didn’t exist like it does now given ore DNA changes. Searching for and mining rocks that are 4-5x times the value of hi-sec ore is now finally worthy of players making a career out of. Similar with ice mining.
Industry
The lower availability of minerals in certain areas and BP changes affects how easily you can build different ships. Like the way frigates and dessies only need 4 mineral types instead of 7. Three of which come from highsec. This is a specialisation. Same thing with the new components. Industrial players can specialise in their construction.
Structures
Reducing structure spam makes them a niche tool rather than easily obtainable by everyone.
ESS
Robbing the bank is a new niche of gameplay.
This is just off the top of my head. But i put the question back to you:
Tell me one area of the game that is LESS specialised or niche by scarcity?
I’m not putting the blame on players for the necessity of scarcity. But i can certainly blame them for quitting.
Take null bears for example: it was no secret that the farming in null was crazy out of hand. It was talked about for years by players, devs and csm. So CCP implemented black out and null bears rejected it.
So CCP came back again with the DBS/ESS and gutting null asteroid belts. Again the farming in null has to be curtailed in some way for the game to be healthy. But the null bears have rejected that too.
That’s because the nullbears don’t want a healthy game. They don’t want a risk/reward balance. They want a farming simulator.
The same goes for all these QQ posts. Scarcity is a bitter pill to swallow, but it is still medicine. If this medicine makes you quit, it means you are the cancer CCP are trying to kill.