We live in an unstable world, where sitting still means you decay and rot. This is true for society as well as businesses, you sit still, and the issues build up until you can't manage them and die. It is through endless growth, endless expansion, that we manage to keep society at large "young", a growing business is going to be less likely to collapse thanks to a shift in customer bases, has more resources to work with in a crisis. A growing society,with more people, can better manage to overcome tasks that we face. If society remained still, anything that hurt it would cause it to shrink, but because we grow the way we do, the things that set us back become "delayed growth".
I see that a bit differently, there's a line between letting the issues build up and correcting them while maintaining a business. I don't think not tackling issues and sitting still are the same thing, for instance, you can be working somewhere that is growing very rapidly without the resources already in place to adequately tackle some of the problems it faces. That kind of thinking is weird to me. It treats the world as an infinite resource, where we are very much a finite commodity. At some point diminishing returns will force the issue of sustaining, pending something like quantum computing becoming a reality. Which given the proper timespan there will be something that pushes us in a new direction of "growth", I have no doubt about that.
Look to the past to see many examples of where we were headed towards destruction and avoided it by more progress, growth, and so on. We were running out of food, about to hit massive famine, before agriculture advanced. We were going to run out of copper for telegraph lines before fiberoptics became a thing. We were going to run out of oil before fracking, oil sands, and many other techniques became worth the money. We were going to pollute the whole planet, before we shifted from an economy based on "more and larger" to "smaller and more advanced". At any point in history, humanity has been on a crash course for destruction, and only through the work of thousands of scientists, the research of many dedicated and hardworking people, do we keep managing to swerve away from it. Without an ever higher population required to solve harder and harder problems, without relative wealth and luxury these people need in order to be able to peruse their interests, without demand for more and more that inspires them to innovate, we would find ourselves stagnating. With that stagnation comes the end to the engine that shifts our demands and destruction to a new, clean, undestroyed area. As for the world being an infinite resource, it certainly isn't. However, there is still a massive number of ways to create more growth, to find new resources that provide as much value as before, but with more common things. Eventually, humanity will have to create a massive, self-enclosed system that is totally self sustaining, and runs on the sum of the resources on earth that are used in as efficient a way as possible. That day is "very" far from today, however.