Boost is not the same. Neither is nitrous. Or high level competition engines.
They will open the LSA up (and lose power) and move the overlap triangle to the right which is retards the cam and probably hurts power a bit around peak torque) but they do all that because if they don’t the valve notches and the geometry of the piston top make combustion less efficient enough that it doesn’t make up for the power gain by a narrower LSA and a centered overlap triangle.