At it’s core capitalism just means that private individuals can own property, instead of the state owning everything. Which is absolutely critical for a free society. It’s paramount that individuals not be dependant on a ruling class for survival.
I’m not sure that means companies wouldn’t be started and everyone would sit around doing nothing.
Ideas, leadership and capital are vital to a functioning economy. Every time a system has been set up that denied that, and it has been tried many times, the results were catastrophic. In several cases tens of millions of people dead catastrophic.
It’s only essential for capital owners to maintain their wealth and power.
Ownership is a term that is loaded and the argument between socialism and capitalism is actually not really helpful.
For instance, if we removed the concept of capital and implemented socialism, there would still be a concept of "responsibility for". So if there were community bicycles, individuals would still have responsibility if they threw the bicycles in a lake. The community officially "owned" the bicycles, and the individual acted against the community's best interests.
Capitalism as written about by Adam Smith seeks to solve the same problem by putting the "ownership" in the hands of the individual, so that the individual is given incentive to care and maintain the bike.
These are both potentially-effective systems that seek to solve the problem of "who's responsible for this bicycle". There are trade-offs for each.
When we simplify complex market-based problems into choices between either capitalism or socialism, we have created nice ways to describe the problem, but neither of them serves as an effective solution to the problem.
For the solution, we have to dig deeper and that means not being beholden to ideologies that can prevent us from seeing good solutions.
With land people don't own the land itself they only have exclusive usage rights for a specific period of time. Once that time is over they are no longer responsible. Thus even with private ownership you still can have the tragedy of the commons problem, it is just divided over time instead of space.
The most common example is soil depletion from industrialized agriculture.
If you wanted to solve this problem you would need a regulatory body that inspects the quality of the soil and fines people who degrade it. Governance becomes essential to balance the micro and macro economy.
