There's nothing wrong with ASIC manufacturer's pocketing a larger share of the money than those they sell miners to.

The problem arises when they defraud investors with intentional deceit.

Most companies make money off of the initial opportunity granted by having investment capital from home miner's orders. Then they pocket an additional portion of the investor's expected return, causing most to go into the red.

No other consumer industry would be able to do this.
It's a fact that will tarnish cryptocurrencies indefinitely, regardless of how widely accepted they become.