A healthy competition in a free market is essential to a growing functioning economy and without a healthy competition, there is bound to be a monopoly in the production of goods and rendering of services.
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From what you said about competition in business by saying healthy competition, of course it is the opposite of what you said next. If there are pros and cons of course the competition will not be healthy. Because there are parties who are harmed.
For example, there are two shops that sell the same item, say clothes. Store A sells clothes for $10, and store B sells clothes for $8. Of course, consumers will choose to buy in store B, because the price is cheaper. Meanwhile, store A cannot sell for less than $10 for some reason. In this case, it has given birth to unhealthy competition.
In business, those who have a larger amount of capital, of course, will grow well, and can compete at any time. Meanwhile, those with small capital cannot run a business because they are unable to compete.
You can see businesses selling products online. There are many price differences from one site to another. And many sites have gone out of business because they are unable to compete.
In essence, if something gives rise to pros and cons, of course it will not give birth to healthy competition.