An Antminer isn't a license to print money. It's a device for hashing blocks.
This is like calling Sony a scam because they sell video cameras to aspiring YouTube stars who never make money out of their aspirations.
It matters, because there are plenty of scams out there, where people exchange money in good faith and receive a substandard good, or nothing at all, in return.
If Bitmain does that, provide evidence. If it doesn't, stop making libelous statements about them.
You may not like their product. I would never buy it. But it isn't a scam.
However, the vast majority of people purchasing ASIC miners think they're going to make money from them.
Another example: GPUs, some people bought em for mining, but independent of mining they accelerate games and digital content creation, and lots of other useful computation.
It's the true believers who think cryptocurrencies are going to save the world from centralized banks who are getting scammed.
That's why I view this as selling pick-axes to unsuspecting and gullible farmers who sold their worldly possessions for the great gold rushes of the 1800s. The people selling the mining equivalent knew the vast majority of them would never earn anything. The best most amazing technologically advanced pick-axes in the world can still be a disrespectful business model.