So given the choice between a $50k tractor which cannot be repaired unless you pay a lot of money and an easy to repair $100k tractor, both farmers and manufacturers will chose the first option. Of course, farmers want an easy to repair $50k tractor, but manufacturers have to make money. And manufacturers want to sell $100k expensive-to-maintain tractors, but competition won't let them.
The system we have now, with all its flaws, is one that suits people the most. We can make laws when the free market doesn't work, for example, we could make $50k unmaintainable tractors illegal, which I think would be great, but it will piss off farmers who will need to pay $100k for their tractors and it will piss off manufacturers who will lose their steady income.
> Imagine today's high-tech world, without the capitalist intellectual property system.
No need to imagine, we have China, and before that, we had USSR. Not perfect examples, especially for China, but these are the real world alternatives to capitalism.