Different kinds of "good". If you don't limit the true competition that capitalism is supposed to offer, then you can't make economic profit in the long term. If your goal, in starting a company, is to continue to make out-sized profits, then there being barriers to entry that you can overcome better than others is a good thing. One way, but not the only way, of overcoming obstacles better is simply overcoming them first: if the cost of overcoming the obstacles is more than the upside in a competitive environment, then you can rake in monopoly profits without it being worth it for others to join you.

Most of this is not necessarily "good" for the consumer or the economy as a whole - although if the barriers to entry are natural and it means that problems are being addressed that otherwise wouldn't be addressed at all, then it might be.