If you’ve got the capital to do either of these, you could do something a lot more positive. If you do this to a company, you’ll destroy the livelihoods of all the workers. Maybe I could see the logic with a fossil fuel extraction, but you must have billions to short it and you could build social housing and schools with that money.

Edit: and if you short it, the capital still exists. Other capitalists will eventually get their hands on the machinery and nothing much changes.