Earlier quoted context omitted.
> Betting against it is doing business with the company. What do you mean? I struggle to understand how betting against a company is "doing business" with them, it seems even less like "doing business" than having no relationship at all. You are actively signaling you expect them to fail.
I think 'with' was the wrong word here. Betting against a company is being in business around the company. Meaning you still trust the business, just trust it enough to fail. You can't not trust something and at the same time bet against it. You must trust one of the two if you want to be involved with the company.
If the company completely disappears tomorrow, your short will be profitable.