I don't agree that that's the biggest problem. I think the biggest problem is that patents are abused to stifle competition by refusing licenses or putting untenable fees on them. No one would have cared about Nintendo's D-pad patent if they'd just put a reasonable license fee on it. On the other hand, a patent like MP3 I would argue is quite legitimate, but putting a patent on a coded just makes interoperability more difficult. If MPEG had charged licenses for decoding chips and explicitly allowed software implementations, that would have things so much more smoother.
Whether it's single passenger cars or AI, nobody really understands how inefficient they and their lives are.
Governments mucking around with things like patents only distorts markets in ways that make them inefficient, and ultimately worse. Anyone who thinks the government's intervention improves things hasn't been at the business end of the government.