I'm going to state the obvious here but..............
Mining has always been a zero-sum game. The only question is whether Bitcoin mining will be lucrative enough that newer manufacturers will be willing to fight the old established entities for the a piece of the pie.
Honestly if you are not willing to play dirty against bitmain, you already lost.
nope not so simple
dedicated asics = by far = zero sum or close to it.
gpus with a vast array of other uses are much further away from zero sum concept.
I am sorry that you don't see the difference between a 2 x 1080 ti rig that was purchased to game more then any other reason and 500 asic equihash miners at 10,000 sols a piece
one is a dedicated zero sum game the other is not although there are zero sum aspects to it.
That gamer will now buy a one card rig when the new video cards come out. Simple adjustment for that type of miner.
The truth is the 2017 boom was done on the backs of gpu expansion and asic leaching.
For me I am okay as I have a power deal that up to 20k-watts is pretty much unbeatable. If mining was to last 15 years I would do well and the 20k-watts of cheap power will only grow for me.
But with bitmain doing the sell gear and sell gear and sell gear and sell more gear I don't think the mining game lasts for 15 more years.
I had a lot of fun with it.