you cannot make the argument that unforseeable effects are patently bad. You're contradicting your terms, and arguing that you have an inkling that it would be bad, rather than, possibly, good.
You say "Risk is bad in business", here, on a forum dedicated to startups? Where our conversation hinges around venture capital investments and quit your day job gambles?
Yeah, some, perhaps even many, risks get you sunk. On the other side of the coin, nothing we discuss here would exist if people didn't take risks with their businesses.
The world would be so different if no-one took risks. I daresay we wouldn't be making tools, have a knowledge of agriculture, or even have spread out of Africa.
So are you saying that leaving risks unspoken means they don't exist? The risks in this case are there regardless of whether the guy talks about them or not.