Fuel cut is when the fuel pump can no longer flow enough fuel to supply what the injectors are demanding. Fuel pressure rises about 1 psi for every psi of boost. As fuel pressure rises, flow falls. Yes, I know that doesn't make sense but it is a proven fact. That 10-14psi range is just the general range that a stock fuel pumps' flow falls off. Now when that happens the air/fuel ratio becomes dangerously high and detonation is emminent. Thats when the ECU cuts the fuel entirely to prevent damage. You can raise the fuel cut boost range with mods like a walbro fuel pump, 550cc injectors and a lexus MAF but fuel cut will always be there. It's your engine's way of telling you you need more fuel.
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