Computers can compute anything, with the only limitations being time, space, energy, programming, etc. So far, it seems like all of those things can be increase

Computers can compute anything, with the only limitations being time, space, energy, programming, etc. So far, it seems like all of those things can be increased without bound. I see no reason to believe that there will be some fundamental limitation that prevents us from improving computers to the point that they can compute the equivalent of a human brain. Yes I agree we don't understand the human brain well enough yet, but empirically we can observe that AI agents and human agents behave in similar ways. Sure, it may not end up being a complete copy of a human brain, but if the inputs and outputs are the same, does it make a difference?