I'm not really well read on this stuff, but do most people think that deep brain computer interfaces are farther off than self-improving artificial general inte

I'm not really well read on this stuff, but do most people think that deep brain computer interfaces are farther off than self-improving artificial general intelligence? I usually see arguments about harmful AGI based on the idea that AGI will be able to optimize itself and acquire computational resources to become powerful in a scary way. I just sort of think that the human brain is already a tremendously powerful computational resource and augmenting it with weaker AI is going to be easier, cheaper, and ultimately, much powerful than AGI. But, of course that depends on the development of really powerful BCIs. Why not develop AI systems that complement the already insanely sophisticated computational system of the human brain instead of trying to replace it? Or enable groups of humans to work together along with AI to solve really hard problems? People often seem to think of AI as an arms race, but is it possible that systems that leverage human intelligence may have an insurmountable advantage?