There's a factor you're ignoring -- a variant of Prisoner's Dilemma. They are not the sole manufacturer of hashpower, there are others willing to dump chips on the market, or hash with those chips (the evil "secret mines"). There's no practical way to reconcile:
1. Protecting the network (requires dumping as much hashpower as needed to make "secret mines" irrelevant --> Miners (their customers) baw).
2. Protecting your customers (not hashing/flooding market with hashpower --> competitors steal profits, network not protected from evil "secret mines").
3. Maximizing profitability (haspower is hashpower, there's no reason for customers to buy brandX if brandY offers the same (Gh/s)/jule, competitors will ramp up the arms race to the (profit-->0) point).
You say there's no way to reconcile those three things, but there most certainly is. If there is a price per gh that they can sell their devices for that will cause them to profit and satisfy all those three requirements, then the business has a future.
Stop. You're wrong in several ways already. First is trivial to explain:
A company owes more to its shareholders than *a* profit. It *must maximise* the profit. At least them's the laws IRL. If you're satisfied when your investment makes a satoshi after a year, you're in the minority.
Second, you're not justified in assuming that selling X chips @$Y ( "all the chips" -- a nonsensical number considering how chips are made) will be possible if other players flood the market with cheaper chips / raise the difficulty level to a point making your chips *unprofitable at any price*. Please consider *all* the variables.
#1 and #2 are not either/or, there is a divide between fully flooding the market and artificial scarcity.
If by "artificial" you mean "not selling all the chips capable of being produced at a profit," then yes they are. If you mean something else, what???
And as for #3, it all comes down to their costs. After covering R&D, I really don't think it's $10/gh or even $1/gh, if they really have a single die that can do 400gh/s. There's a lot of meat on that bone.
My point exactly, meat that has a very short shelf life -- sell it cheap, sell it fast, or pay to have it hauled away & deal with the stench & maggots.
Edit: Don't start with the premise that ASIC manufacturers are doing what they do for the good of bitcoin, assume for a second that they're in it to make money. With that axiomatic, anything that happens to the bitcoin ecosystem is secondary. Any "mission statements" are, therefore nothing but wind.
Why would they not do things for "the good of bitcoin"? It's in their best interest to keep the golden goose as healthy and happy for as long as possible. Clearly these are businesses who are doing things to make a profit, but if you want a sustainable model you have to keep the market you are selling to healthy.
If it is in their best interest to keep the goose alive, they're not guided by goose's welfare, but by profitability. What's the difference? The difference is when the bottom line dictates it is more profitable to kill the goose, take off your hat.