Earlier quoted context omitted.
Not "in general", but there is a long list of unethical behaviors that, sadly, can contribute to success. Selling snake oil. Abusing monopolies. Flat-out lying. However, it's not good to go to the other extreme. I've seen companies fail because the CEO bent over too far backwards to be ethical and as a result let people walk all over him. One of the qualities that seems to be required in a successful founder is a wil…
It's not _required_ to be unethical, it's just really tempting when you see others get rewarded for their unethical behavior. "When circumstances demand it" is of course the excuse of all unethical people throughout history. Total weak sauce.
So, status quo for tech companies is to not read on patents (avoid knowing infringement), grow as fast as they can no matter what patent laws they violate, accumulate their own patents where possible for use in self-defense, and build up lawyer money. One day, when the attacks come, the company will be ready for a solid defense where it claims it didn't know about the patents, they're void, or they're overpriced. This might also be leverage for a better deal during an acquisition.
The operating environment is unethical in its very nature with certain things such as patents, trademarks, copyright, lock-in w/ formats/protocols (eg walled gardens) and so on. So, those that can use them will get a financial advantage. Those that don't might get so much less of the market they get squashed or denied a fortune they could be doing a lot of good with. Lots of grey areas to think through in these sorts of things.