From what I understand, the majority of the most ridiculous minecraft feats are just… writing code to write Minecraft world data for logic circuits, not actually placing the blocks by hand. At a certain scale writing some kind of monstrous compiler to place blocks for you based on a proper circuit plan or programming language becomes easier.
If it’s still the equivalent of gate level, even if those gates are expressed with words rather than placing each block, it’s still a slog. To get beyond gate-level, I think you’d need to write your own HDL and/or synthesis tool for minecraft redstone, which seems even deeper than what most people developing real digital logic do.
Like, I just write verilog and synopsys handles it well enough for my physical design team to have a good starting point.