Software patents or all patents? Serious question.
I think you're exactly right that the western world would continue to innovate without patents. I think what you're missing is that the rent-seeking would continue as normal, simply by using trade secrets, obfuscation, services-models, etc.
Patents was supposed to be a tool to enable competition, but does the reverse now - and it is holding as back as society. We should move away from it. Especially and specifically when it comes to vague, loose ideas just like the GP post says here.
I swear most AI booster arguments can work about as well if we replace AI with the Holy Spirit.
(Apologies if this was sarcasm, I genuinely can't tell these days...)