That presume that we have the ability to finetune patent laws as needed and also presume that world changing inventions are necessarily novel enough to professionals in a given field. It has often happened commonly enough that inventions will occur to several innovators at once as the next step. It is questionable that it would be fair to penalize an inventor just because another was first to file a patent, potentially driving these inventors out of the industry.

It is also pushing against the reality that people are always building on the works of others. Patents are by themselves monopolies. That is how they work. Thus, people had resorted to arrangements to avoid constant patent lawsuits, which had happened in the past.