Earlier quoted context omitted.
It's possible to make stable-coins using just price oracle and collateral. Most attempts at "algorithmic" stable coins have failed. See TerraDollar, Luna and Titan.
Over-collateralized stables are different from "algorithmic": the algorithmic ones are not fully backed by reserves.
And you just know that the "collaterized" ones are? In most cases, their books aren't open. And they wouldn't lie about this would they?
In some strange way, the crypto brain has been programmed to ignore the obvious with a hand wave and just accept all the chicanery that is crypto.