While virtually all organisms compete with members of their own species, for individuals, the degree of competitiveness can vary significantly. And competitiveness can fluctuate over time. In its evolution, it favours diversification.
In nature, however, when some organisms develop their features to become more competitive in certain ways, this ultimately holds back their capability to maximise their overall resources. They end up specialising, and spending most of their time and energy seeking higher quality resources. But if there is too much of this, it becomes like an arms race, until the cost of competitiveness becomes too high.
In organisations and enterprises, where colleagues compete against each other for promotions, positions or sales, this too can be a drain on time and resources, which would be better spent dealing with external challenges.
And the same can apply to how different businesses compete with each other. Collaboration might not offer the same immediate rewards as competition, but it can offer other, longer-term benefits.